CGTO PG-85-00-310-A.pdf
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This is the Aviation Life Support Equipment Systems Process Guide (CGTO PG-85-00-310-A), a technical manual issued by the U.S. Coast Guard Aviation Logistics Center dated March 24, 2022, that supersedes the previous November 2021 version. The guide establishes procedural standards and maintenance requirements for all Aviation Life Support Equipment (ALSE) systems used across the Coast Guard aviation enterprise. All Coast Guard personnel and contractors supporting aviation operations are required to comply with the guidelines outlined in this process guide.
The document comprehensively covers seven major categories of ALSE: inflatable equipment (liferafts including LRU-25/A crew raft, LRU-33/A wing raft, RSLR-1, POD-8, and mass rescue operations rafts; passenger and survival vests including MD1127, AV-35, LPU-26/P, LPU-27/FW, LPU-27/PE, LPU-27/PEG, and NCR variants; and rescue swimmer harness TRITON); aerial delivery systems and their inspection protocols; survival equipment and kits including cutting tools, signaling devices, and communications equipment; rescue equipment such as litters, baskets, and emergency medical devices; protective equipment including flight suits, helmets, gloves, boots, and immersion suits; and fabrication procedures for webbing, splicing, and harness construction. The guide specifies inspection intervals ranging from 180 to 360 days depending on equipment type, establishes maintenance procedures through referenced Maintenance Procedure Cards (MPCs), provides detailed functional descriptions and configuration specifications for each equipment type, and includes step-by-step procedures for preflight checks, weekly inspections, post-flight evaluations, and routine maintenance tasks. All recommendations for changes and improvements must be submitted via chain of command to ALC Engineering Services Division using the Aviation Technical Information Portal (ATIP) Deficiency Report (CG-22) process.
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AVIATION LIFE SUPPORT
EQUIPMENT SYSTEMS
PROCESS GUIDE
CGTO PG-85-00-310-A
Distribution Statement D: Distribution authorized to the DHS/CG/DoD and their contractors for Administrative or Operational use, 24 March 2022. Other requests shall be referred to Aviation Logistics Center (ALC), Aviation Life Support Equipment (ALSE) Technical Services.
WARNING: This document contains technical data whose export is restricted by the Arms Export-Control Act (Title 22, U.S.C., Sec 2751, et. seq.) or the Export Administration Act of 1979, as amended, Title 50, U.S.C. App 2401 et. seq. Violations of these export laws are subject to severe criminal penalties. Disseminate in accordance with provisions of DoD Directive 5230.25.
DESTRUCTION NOTICE: For classified documents, follow the procedures in DoD 5200.22-M, National Industrial Security Program Operating Manual, Section 5-705 or DoD 5200.1-R, Information Security Program Regulation, Chapter VI, Section 7. For unclas-sified, limited documents, destroy by any method that will prevent disclosure of contents or reconstruction of the document.
CGTO PG-85-00-310-A dated 24 March 2022 supersedes CGTO PG-85-00-310-A dated 17 November 2021.
24 March 2022
Commanding Officer United States Coast Guard Aviation Logistics Center
1664 Weeksville Road Elizabeth City, NC 27909 Staff Symbol: esd Phone: (252) 335-6943 Email: Ryan.B.Popiel@uscg.mil
MEMORANDUM
From: Ryan B. Popiel, CDR
CG ALC (ESD)
Reply to Attn of:
Dominic J. Mosler
(252) 335-6071
To: CGTO PG-85-00-310-A Users
Subj: AVIATION LIFE SUPPORT EQUIPMENT SYSTEMS PROCESS GUIDE, CGTO PG-85-00-310-A
1. PURPOSE. This memorandum promulgates the Aviation Life Support Equipment Systems Process Guide, CGTO PG-85-00-310-A.
2. ACTION. All Coast Guard personnel and contractors who support the aviation enterprise are required to adhere to the guidelines set forth in the enclosed process guide.
3. DIRECTIVES AFFECTED. This process guide supersedes CGTO PG-85-00-310-A dated 17 November 2021.
4. DISCUSSION. This process guide ensures procedural consistency for the Aviation Life Support Equipment Systems by establishing specific guidelines that will be followed.
5. CHANGES. Recommendations for changes and improvements to the Aviation Life Support Equipment Systems Process Guide will be submitted via the chain of command to ALC Engineering Services Division (ESD), using the Aviation Technical Information Portal (ATIP) Deficiency Report (CG-22).
6. ENVIRONMENTAL ASPECTS AND IMPACT CONSIDERATIONS. Environmental considerations were examined in the development of this publication and have been determined to not be applicable.
Digitally signed by
POPIEL.RYAN.BENJAMIN.1248446095
Date: 2022.03.24 21:51:15 -04'00'
HIGHLIGHTS
CG-22 No. Location Description of Change
501001383577 Chapter 5.N.3.a. Updated step
501001383577 Chapter 5.N.3.b. Added step and relabeled subsequent steps
501001383577 Chapter 5.N.4. Deleted caution and added note
501001385665 Chapter 6.G.2.c. Added note
501001389068 Chapter 6.G.3. Added step and renumbered subsequent step
501001389068 Chapter 6.G.4. Updated step
501001389068 Chapter 6.P.4.b. Updated step
501001389068 Chapter 6.P.4.c. Updated step
501001389068 Chapter 6.P.5.b. Updated step
CGTO PG-85-00-310-A
TABLE OF CONTENTS
CHAPTER 1 OVERVIEW
A. Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 B. Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 C. Updates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
CHAPTER 2 INFLATABLE EQUIPMENT
A. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 B. Liferaft Management . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 C. CO2/N2 Servicing System . . . . . . . . . . . . . . . . . . . . . . . . 2-1 D. LRU-25/A Crew Raft . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 E. LRU-33/A Wing Raft . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 F. RSLR-1 Liferaft . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 G. POD-8 Liferaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 H. Mass Rescue Operations Liferaft . . . . . . . . . . . . . . . . . . . . . 2-7 I. Passenger and Survival Vest Maintenance . . . . . . . . . . . . . . . . . . 2-8 J. MD1127 Rotary Wing Passenger Vest . . . . . . . . . . . . . . . . . . . . 2-8 K. AV-35 Fixed Wing Passenger Vest . . . . . . . . . . . . . . . . . . . . . 2-10 L. LPU-26/P Survival Vest . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 M. LPU-27/FW Survival Vest . . . . . . . . . . . . . . . . . . . . . . . . 2-12 N. LPU-27/PE SAR Warrior Survival Vest. . . . . . . . . . . . . . . . . . . . 2-13 O. LPR-27/PEG Survival Vest. . . . . . . . . . . . . . . . . . . . . . . . 2-16 P. National Capital Region (NCR) Survival Vest . . . . . . . . . . . . . . . . . 2-18 Q. Helicopter Rescue Swimmer Harness (TRITON) . . . . . . . . . . . . . . . . 2-20
CHAPTER 3 AERIAL DELIVERY SYSTEMS
A. Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 B. Inspection Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 C. Contamination . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 D. Cleaning ADS Canopies . . . . . . . . . . . . . . . . . . . . . . . . 3-2
CHAPTER 4 SURVIVAL EQUIPMENT AND KITS
A. Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 B. Cutting Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 C. Visual and Audible Signaling/Marking Devices . . . . . . . . . . . . . . . . . 4-5 D. Underwater Egress Device . . . . . . . . . . . . . . . . . . . . . . . 4-8 E. Communications Devices . . . . . . . . . . . . . . . . . . . . . . . . 4-10 F. Survival Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13 G. Liferaft Survival Kit Contents . . . . . . . . . . . . . . . . . . . . . . . 4-15
CHAPTER 5 RESCUE EQUIPMENT
A. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 B. Folding Litter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 C. MEDEVAC Board . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 D. Rescue Basket . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 E. Rescue Sling . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 i
F. Quick Strop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 G. Portable Salvage Pump. . . . . . . . . . . . . . . . . . . . . . . . . 5-4 H. Emergency Medical Technician (EMT) Kit . . . . . . . . . . . . . . . . . . 5-5 I. Automated External Defibrillator (AED) . . . . . . . . . . . . . . . . . . . 5-5 J. Patient Monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5 K. Emergency Recovery Device . . . . . . . . . . . . . . . . . . . . . . . 5-6 L. Hoist Quick Splice . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6 M. Helicopter Trail Line/Weight Bag . . . . . . . . . . . . . . . . . . . . . . 5-7 N. Crewmember Aircraft Safety Belts . . . . . . . . . . . . . . . . . . . . . 5-8 O. Message Streamer . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9 P. Hoist Manual Cable Cutter . . . . . . . . . . . . . . . . . . . . . . . . 5-9
CHAPTER 6 PROTECTIVE EQUIPMENT
A. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 B. Flight Suit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 C. Fire-Resistant Undershirts . . . . . . . . . . . . . . . . . . . . . . . . 6-3 D. Fabrication of Standardized Name Tag . . . . . . . . . . . . . . . . . . . 6-5 E. Flight Sunglasses . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5 F. G-1 Leather Flight Jacket . . . . . . . . . . . . . . . . . . . . . . . . 6-6 G. Modular Flight Ensemble . . . . . . . . . . . . . . . . . . . . . . . . 6-6 H. Flight Ensemble Multiclimate Protection System (MCPS) . . . . . . . . . . . . . 6-11 I. Flight Boots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14 J. Flight Gloves . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15 K. Hoist Glove . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16 L. SPH-5CG Flight Helmet . . . . . . . . . . . . . . . . . . . . . . . . 6-17 M. HGU-56/P Flight Helmet . . . . . . . . . . . . . . . . . . . . . . . . 6-22 N. Gath Gedi Helmet. . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26 O. Team Wendy Exfil LTP Helmet . . . . . . . . . . . . . . . . . . . . . . 6-27 P. Team Wendy Exfil BALLISTIC Helmet . . . . . . . . . . . . . . . . . . . . 6-28 Q. Aircrew Anti-Exposure Coveralls (MAC-10) . . . . . . . . . . . . . . . . . . 6-32 R. Wool Socks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-33 S. Cold Weather Insulating Polypropylene Socks . . . . . . . . . . . . . . . . . 6-33 T. Immersion Suit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-33 U. Aircrew Dry Coveralls (ADC) . . . . . . . . . . . . . . . . . . . . . . . 6-37 V. Minimum Flight Gear List . . . . . . . . . . . . . . . . . . . . . . . . 6-44 W. Passenger (PAX) Flight Gear . . . . . . . . . . . . . . . . . . . . . . . 6-45 X. Personal Clothing and Equipment Record . . . . . . . . . . . . . . . . . . 6-46
CHAPTER 7 FABRICATION
A. Thread and Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 B. Webbing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 C. Hook-and-Pile Tape . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2 D. Knots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4 E. Basic Splicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7 F. Basic Line Whippings . . . . . . . . . . . . . . . . . . . . . . . . . 7-9 G. AUF Liferaft Retention Harness . . . . . . . . . . . . . . . . . . . . . . 7-10 ii
H. Timing Sewing Hook to Needle . . . . . . . . . . . . . . . . . . . . . . 7-13
CHAPTER 8 HELICOPTER RESCUE SWIMMER AUTHORIZED EQUIPMENT LIST
A. Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 B. Organizational Clothing . . . . . . . . . . . . . . . . . . . . . . . . . 8-2 C. Rescue Swimmer Equipment . . . . . . . . . . . . . . . . . . . . . . . 8-5 D. Disentanglement Training Equipment . . . . . . . . . . . . . . . . . . . . 8-13 E. Inland SAR Ensemble . . . . . . . . . . . . . . . . . . . . . . . . . 8-13 F. Vertical Surface Operations Equipment . . . . . . . . . . . . . . . . . . . 8-17 G. Ice Operations Equipment . . . . . . . . . . . . . . . . . . . . . . . . 8-19
CHAPTER 9 AIRCRAFT ALSE INSPECTIONS
A. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1 B. C-130H ALSE Equipment . . . . . . . . . . . . . . . . . . . . . . . . 9-1 C. C-130J ALSE Equipment . . . . . . . . . . . . . . . . . . . . . . . . 9-1 D. C-27 ALSE Equipment . . . . . . . . . . . . . . . . . . . . . . . . . 9-1 E. C-144 ALSE Equipment . . . . . . . . . . . . . . . . . . . . . . . . 9-2 F. H-60 ALSE Equipment . . . . . . . . . . . . . . . . . . . . . . . . . 9-2 G. H-65 ALSE Equipment . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
GLOSSARY
ENCLOSURE INDEX
Enclosure (1) AUF Authorized Equipment List for Gunner Units Enclosure (2) Advanced Strobe Light and Battery Test Set, Aircrew Helmet, and Headset Communications
Test Set Enclosure (3) USCG Aircraft Tempest-Approved Headset/Helmet List iii
CHAPTER 1. OVERVIEW
A. PURPOSE This process guide provides information critical for proper maintenance and utilization of Coast Guard Aviation Life Support Equipment (ALSE). Procedures found in the appropriate ALSE Maintenance Procedure Cards (MPC) take precedence, but will refer to this process guide for supplemental maintenance procedures.
B. CONTENTS This process guide contains instructions, technical data, illustrations, procedures, inspection intervals, and descriptions pertinent to configuration, modification, application, and use of Coast Guard ALSE systems and rescue equipment. The process guide, combined with applicable MPCs, cannot cover every possible repair or discrepancy that could arise. For any malfunction or discrepancy not discussed in the process guide or MPC, contact ALSE Technical Services or ALSE Prime Unit for further guidance. The Shop Chief has the ability to initiate a basic repair as necessary, but that repair shall not alter the functionality or integrity of the life support equipment (e.g., reinforcement of a damaged handle).
All data relevant to Coast Guard ALSE, formerly contained in Coast Guard, Air Force, and Navy publications, have been assimilated by this process guide.
The Aviation Logistics Center (ALC) maintains the NAVAIR 13-1-6 (Aviation Crew System) series manuals. ALC ALSE Technical Services will formulate, produce, and distribute applicable equipment change actions to the equipment and to respective sections of this process guide.
C. UPDATES This process guide will be updated periodically. The superseded publication shall be discarded. Compliance with all directives (Commandant Instructions, Coast Guard Technical Orders, etc.) issued after the date of the latest index is required.
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CHAPTER 2. INFLATABLE EQUIPMENT
A. INTRODUCTION Inflatable devices that are maintained by Coast Guard aviation units for the purpose of crew and passenger survival and as lifesaving devices will be placed in service, inspected, maintained, and repaired in accordance with the appropriate ACMS/MSR MPC. These MPCs are provided by ALC Engineering Services Division (ESD) and are available in the Aviation Technical Information Portal (ATIP).
B. LIFERAFT MANAGEMENT
1. Repairs For determination of repairability, refer to Aviation Life Support Equipment Systems Manual, COMDINST M13520.1 (series). Repairs will be completed in accordance with the applicable inflatable MPC or the text-only Inflatables Repair MPC.
2. Barometric Conversion Table
Table 2-1. Barometric Conversion Table
Press Diff
(in hg) Corr (psi)
Press Diff
(in hg) Corr (psi)
Press Diff
(in hg) Corr (psi)
Press Diff
(in hg) Corr (psi)
Press Diff
(in hg) Corr (psi)
0.01 0.005 0.16 0.078 0.31 0.152 0.46 0.225 0.61 0.299
0.02 0.010 0.17 0.083 0.32 0.157 0.47 0.230 0.62 0.304
0.03 0.015 0.18 0.088 0.33 0.162 0.48 0.235 0.63 0.309
0.04 0.020 0.19 0.093 0.34 0.167 0.49 0.240 0.64 0.314
0.05 0.025 0.20 0.098 0.35 0.172 0.50 0.245 0.65 0.319
0.06 0.030 0.21 0.103 0.36 0.176 0.51 0.250 0.66 0.323
0.07 0.035 0.22 0.108 0.37 0.181 0.52 0.254 0.67 0.328
0.08 0.040 0.23 0.113 0.38 0.186 0.53 0.260 0.68 0.333
0.00 0.045 0.24 0.118 0.39 0.191 0.54 0.265 0.69 0.338
0.10 0.049 0.25 0.123 0.40 0.196 0.55 0.270 0.70 0.343
0.11 0.054 0.26 0.127 0.41 0.201 0.56 0.275 0.71 0.348
0.12 0.060 0.27 0.132 0.42 0.206 0.57 0.279 0.72 0.353
0.13 0.064 0.27 0.137 0.43 0.211 0.57 0.284 0.73 0.358
0.14 0.069 0.29 0.142 0.44 0.216 0.59 0.289 0.74 0.363
0.15 0.073 0.30 0.147 0.45 0.221 0.60 0.294 0.75 0.368
Rise in pressure: Subtract from gauge reading.
Fall in pressure: Add to gauge reading.
C. CO2/N2 SERVICING SYSTEM
NOTE
To ensure a minimal amount of moisture input to inflation assem-blies, all CO2 shall pass through two purifier assemblies connected in series. The purifier cartridges in each assembly shall be re-placed after 250 pounds of CO2 have passed through cartridges.
1. CO2/N2 Charging System Features
a. Charges the cylinders with N2 and CO2 with a single filler nozzle attachment
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24 March 2022 http://osc-s-lim-ap100.osc.uscg.mil:7108/ATIP/ATIP/login.xhtml http://osc-s-lim-ap100.osc.uscg.mil:7108/ATIP/ATIP/login.xhtml
b. Air dryer that provides the shop and charging system with desiccated and filtered air
2. Compressed Air Dryer Features
a. Dries compressed air to protect the CO2/N2 pump from freezing during operation, and to provide high-grade filtered dry air for general shop use
b. Dries air to a dew point of -40 °F (IOS 8573.1 Class 1.2.1)
c. Maximum pressure: 150 PSIG
d. Operating temperature: 41-122 °F
e. Need not be mounted in the shop
3. Operation The dryer column contains two chambers of desiccant material. While one is drying the compressed air (absorption), the other is simultaneously undergoing regeneration (desorption). Approximately every 2 minutes, the two columns automatically reverse in function. At changeover, the air in the desorption column is vented to the atmosphere.
4. System Maintenance
a. Inspections
(1) Accept Upon original issue, when received from supply, or when accepted from another unit for permanent custody.
(2) Inspection Every 12 months in accordance with MPC 121001.0. If possible, complete at the same time the bottle needs to be filled during LRU-25 or LRU-33 inspection.
b. Compressed Air Dryer Desiccant Material typically exceeds 10,000 hours (3-1/2 years, 8 hours per day). The primary indication that the desiccant requires changing is the CO2/N2 pump freezing during operation.
c. Dryer Filters Typically last 2 to 3 years. Before the system is used, check for debris or liquid in the filter bowls and clean as required to assure proper operation.
d. Before each use, visually check the conditions of the valves and hoses.
e. Scale calibration (QA).
D. LRU-25/A CREW RAFT
1. Introduction The LRU-25/A crew raft is designed to provide an emergency flotation system in the event of emergency water-ditching for the involved aircrew and passengers. The LRU-25/A is a dual-tube, nonreversible liferaft with a self-erecting canopy. The LRU-25/A is manufactured from yellow urethane-coated nylon and has a volume of 26.8 cubic feet, and the operating pressure is 1.3 to 4.7 PSIG.
Normal capacity is six persons and overload capacity is nine persons. Inflation time is 30 seconds. It has a water-activated internal light system. The LRU-25/A liferaft assembly is used for aircrews in H-60, H-65, and C-144 aircraft.
2. Configuration The LRU-25/A crew raft is configured for manual deployment and inflation. It consists of five major subsystems: The inflatable liferaft, an inflation assembly, a repair kit, a urethane-coated nylon carrying case, and a survival items container.
3. Description The liferaft is composed of two structurally joined, pneumatically independent tube assemblies which are hexagonal in shape. The top tube incorporates an arch tube that is a separate air-holding chamber, inflated by utilizing an internal relief valve that directs pressure from the top tube into the arch tube. The canopy arch tube supports the canopy and when fully inflated prevents collapse in severe conditions. The bottom tube incorporates a ballasting system to provide stability and an inflatable boarding ramp. The boarding ramp is made of a separate air-holding chamber inflated through an internal relief valve. A noninflatable insulated floor is suspended below the bottom tube.
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a. The inflation/deflation valves are spring-loaded poppet-type valves which open or close automatically by the attachment or removal of the valve adapter on the manual inflation pump. To increase the air pressure in either tube, push the pump adapter firmly into the inflation/deflation valve of that tube. Squeeze the pump until the desired pressure has been obtained.
b. Each overpressure relief valve is operated by a spring-loaded piston and sealed by an O-ring. The external relief valve operating pressure is approximately 3.2 PSIG. The internal relief valve operating pressure is approximately 2.9 PSIG.
c. A heaving ring and line assembly are provided as a rescue aid which may be hand-thrown to persons in the water who are unable to reach the liferaft. The heaving line incorporates a length of nylon cord which is tied off to the lifeline on the inside of the liferaft. The free end of the line has a 6-inch floating rubber tossing ring or quoit attached.
d. Lifelines located externally on the lower tube perimeter, and internally on the upper tube, serve as aids for survivors to grasp from the water and while seated in the liferaft.
The lifelines are constructed of 1-inch wide webbing attached to the inflatable at intervals by means of fabric patch material.
e. The sea anchor is a cone-shaped cloth bag with a cord bridle attached to the cable and is used to control the drift rate and orientation of the liferaft with respect to the wind.
f. A lightweight canopy is packed, installed on the liferaft, and is automatically erected upon deployment of the liferaft. The canopy can be detached for ease of rescue and in hot environments.
4. Function Deployment and inflation of the LRU-25/A is found in the applicable aircraft flight manual. The LRU-25/A liferaft is not reversible. If it inflates upside down and does not self-right, pulling on the righting strap will easily right the liferaft to the upright position. The location of the righting strap is indicated on the bottom of the liferaft. To right the liferaft, find the righting strap where it attaches to the raft near the inflation assembly. Turn the raft until the wind is in your face. Pull the righting strap hand-over-hand, lifting the far side of the raft out of the water. It may be necessary to push your feet or knees into the side of the raft and lean back when pulling. As the raft comes over, protect your face and head, then use the righting strap to pull yourself out from under the liferaft.
5. Inspection Intervals The following are inspection intervals for the LRU-25/A crew raft:
a. Acceptance On original issue, when received from supply, or accepted from another unit for permanent custody
b. Leak Test Inspection Intervals not to exceed 360 days
c. Functional Test On acceptance and at intervals that coincide with every third leak test, or every 36 months
6. Repair Procedures For determination of repairability for the liferaft and/or container, refer to Aviation Life Support Equipment Systems Manual, COMDINST M13520.1 (series), Chapter 2, Paragraph D.2 and Paragraph D.3. All repairs will be in accordance with MPC 256204.0.
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24 March 2022
7. CO2 Inflation Assembly Configuration
a. The LRU-25/A crew raft inflation assembly consists of an aluminum cylinder reinforced with overlapping carbon filaments bonded with epoxy resin. It is rated at 3,500 ±100 PSIG at 70 °F with a combination charge of 2.20 pounds of CO2 and 1.7 pounds of N2.
b. A pull force of 6 to 15 pounds is required to actuate the inflation valve.
c. The overpressure rupture disk will rupture at 4,500 to 4,900 PSIG.
d. The cylinder pressure gauge utilizes a GO-NO-GO color band to indicate cylinder pressure.
e. The inflation valve utilizes a common filler valve for inflation assembly filling and bleeding.
f. The cylinder is required to be hydrostatically tested every 5 years (60 months) and has a service life of 3 hydrostatic tests or a life limit of 15 years from the date of manufacture.
E. LRU-33/A WING RAFT
1. Introduction The LRU-33/A liferaft is designed to provide an emergency flotation system in the event of emergency water-ditching for the involved aircrew and passengers. The LRU-33/A is a dual-tube, nonreversible liferaft with a self-erecting canopy. The LRU-33/A is manufactured from yellow urethane-coated nylon and has a volume of 86.3 cubic feet, and the operating pressure is 1.5 to 3.6 PSIG at 70 ºF.
Normal capacity is 20 persons and overload capacity is 30 persons. Inflation time is 30 seconds. It has a water-activated internal light system. The LRU-33/A 20-person liferaft assembly is used as an HC-130 wing raft.
2. Configuration The liferaft is configured for manual deployment and inflation, and consists of five major subsystems: The inflatable liferaft, an inflation assembly, a repair kit, a urethane-coated nylon carrying case, and a survival items container.
3. Description The LRU-33/A liferaft is hexagonal in shape, composed of two structurally joined pneumatically independent tube assemblies. It is inflated from one CO2 composite cylinder. The top tube incorporates an arch tube which supports the canopy and when fully inflated prevents collapse in severe conditions. The bottom tube incorporates a ballast system that provides stability and two inflatable boarding ramps. A noninflatable insulated floor is suspended below the bottom tube. The floor is covered with a foam fabric which provides minimal insulation and partial protection from hypothermia. Topping-off valves are spring-loaded poppet valves and are located in both the upper and lower tubes. These valves open automatically with the insertion of the adapter on the hand-inflation pump. The valve closes automatically when the adapter is removed from the topping-off valve. To increase the air pressure in either tube, insert the pump adapter into the topping-off valve and squeeze the pump repeatedly until the desired pressure has been obtained. The relief valve is a spring-loaded piston sealed by an O-ring, and limits the maximum pressure when rising internal gas temperature increases the internal pressure. The relief valve opening pressure is approximately 3.2 PSIG (2.2 N/cm2), and the closing pressure is 2.4 PSIG (1.7 N/cm2).
4. Function Procedures for the inflation and deployment of the LRU-33/A from the wing raft compartment are found in the applicable aircraft flight manual. During inflation, the valve release cable activates the inflation cylinder discharge valve releasing compressed gas equally into each flotation tube. Check valves, located at the inflation assembly hose attachment point on the liferaft, prevent pressure from moving between tubes. The canopy support tube facilitates upright inflation of the liferaft in the water. In the case of the raft inflating inverted or being overturned, a righting strap is manufactured into the underside of the floor to aid in righting the raft.
5. Inspection Intervals The following are inspection intervals for the LRU-33/A wing raft.
a. Acceptance On original issue, when received from supply, or accepted from another unit for permanent custody
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b. Leak Test Inspection Intervals not to exceed 360 days
c. Functional Test On acceptance and at intervals that coincide with every third leak test, or every 36 months
6. Repair Procedures For determination of repairability for the liferaft and/or container, refer to
Aviation Life Support Equipment Systems Manual, COMDINST M13520.1 (series), Chapter 2, Paragraph D.2 and Paragraph D.3. All repairs will be in accordance with MPC 256420.0.
7. CO2 Inflation Assembly Configuration
a. The LRU-33/A inflation assembly consists of an aluminum cylinder, reinforced with overlapping carbon filaments bonded with epoxy resin. It is rated at 3,500 ±100 PSIG with a combination charge of 3.06 pounds of CO2 and 5.7 pounds of N2. A pull force of 6 to 15 pounds is required to actuate the inflation valve. The overpressure rupture disk will burst at 4,500 to 4,900 PSIG. The cylinder pressure gauge utilizes a numbered GO-NO-GO color band to indicate cylinder pressure. The inflation valve utilizes a common filler valve for inflation assembly filling and bleeding. The valve requires no disassembly or rebuild after actuation, prior to recharge. The cylinder is required to be hydrostatically tested every 5 years.
8. Crew Raft Storage Cradle Figure 2-1 illustrates the construction dimensions for building an LRU-33/A crew raft storage cradle. The wood used shall be 1- x 4-inch pine shelving or equal. The purpose of this cradle is for storage, not packing. Storing the LRU-33/A crew rafts in these cradles will provide shape integrity and facilitate fitting the packed wing raft into the wing raft compartment on the aircraft.
Figure 2-1. LRU-33/A Crew Raft Storage Cradle Dimensions
F. RSLR-1 LIFERAFT
1. Configuration The RSLR-1 liferaft is a single-person liferaft used in rotary wing aircraft for deployment to a helicopter Rescue Swimmer (RS) or person(s) in the water. It is constructed of polyurethane-coated nylon fabric using Radio Frequency (RF) welding. It weighs 7 pounds and provides 180 pounds of flotation.
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a. Main Inflation Tube
(1) The buoyancy tube is a single, U-shaped tube constructed of polyurethane-coated nylon fabric using RF welding for seam construction. Internally, the tube is divided into two independent air-holding chambers, upper and lower, separated by a bulkhead. In the event that one air-holding chamber is deflated, the remaining chamber may be inflated to regain the original shape of the raft.
(2) The upper and lower chambers of the main tube are inflated mechanically through CO2 inflation assemblies located on the main tube.
NOTE
When the inflation assembly is activated, the actuation levers will separate from the main valve body.
(3) There are two locking oral inflation valves on the main tube: At the CO2 inflation assembly and on the opposite side of the main tube. These valves will inflate the chamber on that side of the main tube. In the event that one air-holding chamber of the main inflation tube is damaged and deflates, the remaining chamber may be inflated to regain the original shape of the raft.
(4) The inflation lanyard is also the retention lanyard and is connected to the raft by a Lark’s Head knot around the CO2 inflation assembly valve.
b. Canopy/Canopy Tube
(1) The canopy tube is independent of the main tube. It is inflated only through a locking oral inflation valve located to the left of the user inside the raft.
(2) The canopy support tube supports the canopy above and away from the head of the user to provide head room and ventilation when the canopy is closed.
(3) When unzipped, the canopy may be rolled and stowed under hook-and-pile tape, located in four positions on the rear and right side of the main tube perimeter.
(4) The canopy has a window to provide external visual reference and a vent above the sea anchor attachment point.
(5) The sea anchor attaches at the back of the raft, allowing the raft to face downwind when deployed.
c. Raft Floor The raft floor has dimensions of 10 x 4 x 3 inches, and its design allows for a slight recline position with the center of gravity below the waterline, increasing inherent stability.
2. Activation To inflate, pull on the inflation/retention lanyard. The raft should inflate to the design shape within 30 seconds. After boarding the raft, the canopy may be raised by releasing the hook-and-pile stow straps and orally inflating the arch. Complete canopy erection is achieved by pulling one or two of the supplied zippers.
3. Inspection Intervals The following are inspection intervals for the RSLR-1 liferaft:
a. Acceptance On original issue, when received from supply, or accepted from another unit for permanent custody
b. Leak Test Inspection Intervals not to exceed 180 days
c. Functional Test On acceptance and at intervals that coincide with every sixth leak test, or every 36 months
4. Repair Procedures For determination of repairability for the liferaft and/or container, refer to
Aviation Life Support Equipment Systems Manual, COMDINST M13520.1 (series), Chapter 2, Paragraph D.2 and Paragraph D.3. All repairs will be in accordance with MPC 256201.0.
G. POD-8 LIFERAFT
1. Introduction The POD-8 liferaft is a lightweight, air-droppable, octagonal-shaped, eight-person raft with a large, single 15-inch diameter tube. It is constructed of 210 denier
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24 March 2022 nylon, polyurethane double-coated fabric and provides over 200 pounds of buoyancy per person.
2. Description The POD-8 liferaft has two air-holding chambers with internal sleeves which allow the raft to regain its original shape and buoyancy in the event of a puncture. It has a 2,000-PSI, dry-air closed inflation system (one for each air-holding chamber), water-activated light, pressure relief valves and manual backup hand inflation pump, four boarding ladders, and a righting strap on the underside of the raft.
3. Configuration/Function The POD-8 liferaft can be used as a single droppable raft with survival items included or as part of a kit with survival items in separate bag(s) connected by yellow polypropylene line.
a. ADR-8 The ADR-8 is a single POD-8 raft. It is equipped with an inflation lanyard and can be dropped inflated or uninflated. The 12-foot Aerial Delivery System (ADS) shall be used for its deployment from a fixed wing aircraft.
b. ASRK-16 The ASRK-16 is an aerial sea rescue kit consisting of three containers:
Two POD-8 lilferafts and one waterproof survival equipment bag, designed to stay afloat for 6 hours after deployment. Each raft is equipped with an inflation lanyard, allowing the rafts to be deployed inflated.
c. ASRK-24 The ASRK-24 is an aerial sea rescue kit comprised of five containers.
Containers one, three, and five each contain a POD-8 lilferaft. Each raft is equipped with an inflation lanyard, allowing the rafts to be deployed inflated. Containers two and four are waterproof survival equipment containers, each designed to remain afloat for 6 hours after deployment.
d. Deployment Deployment procedures for the different configurations of the POD-8 liferaft can be found in each aircraft type flight manual.
4. Inspection Intervals The following are inspection intervals for the POD-8 liferaft, no matter what configuration the raft is a part of:
a. Acceptance On original issue, when received from supply, or accepted from another unit for permanent custody
b. Leak Test Inspection Intervals not to exceed 360 days
c. Functional Test On acceptance and at intervals that coincide with every third leak test, or every 36 months
5. Repair Procedures For determination of repairability for the liferaft and/or container, refer to
Aviation Life Support Equipment Systems Manual, COMDINST M13520.1 (series), Chapter 2, Paragraph D.2 and Paragraph D.3. All repairs will be in accordance with MPC 256160.0 (ADR-8), MPC 256171.0 (ASRK-16), and/or MPC 256170.0 (ASRK-24).
6. CO2 Inflation Assembly Configuration POD-8 inflation assembly consists of two 125-cubic inch cylinders, each rated at 3,000 PSIG. The pressure relief valve is designed to vent at 4,200 to 4,500 PSIG. The inflation valve utilizes a common filler valve for inflation assembly filling and bleeding. The valve requires rebuild after actuation, prior to recharge. The cylinder is required to be hydrostatically tested every 3 years (36 months) and has a service life of 8 hydrostatic tests (24 years).
H. MASS RESCUE OPERATIONS LIFERAFT
1. Introduction The Mass Rescue Operations (MRO) 20-person liferaft, P/N 64510-103, made by Air Cruisers is the only authorized mass rescue operations liferaft. It is a commercial raft system serviced by the manufacturer and funded by Districts with a mass rescue response requirement. The MRO raft is used as an emergency flotation platform to be deployed from rotary wing aircraft or vessel to large groups of survivors in the water.
2. Configuration/Inflation The MRO raft is configured to be dropped and subsequently inflated from a helicopter in a hover, or minimum forward airspeed. It is not prerigged with an inflation lanyard; therefore, when deploying this raft, the flight mechanic will obtain a trail line from the Search and Rescue (SAR) board and pay out approximately 3 feet from each end. The weak
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24 March 2022 http://osc-s-lim-ap100.osc.uscg.mil:7108/ATIP/ATIP/login.xhtml http://osc-s-lim-ap100.osc.uscg.mil:7108/ATIP/ATIP/login.xhtml link end of the trail line shall be attached to the inflation cable on the raft. A weight bag shall be attached to the other end. Deployment and inflation procedures are found in the MH-65D Flight Manual, CGTO 1H-65D-1.
3. Inspection Intervals Mass casualty rafts are inspected and repacked by the manufacturer at 5-year intervals. AST shops will do an annual visual inspection of the raft to verify location and condition of the packaging. This annual visual inspection will be enrolled in ACMS as a Special Requirement (SR) item. The 5-year inspection will be enrolled in ACMS as an SR inspection to ensure tracking on the Maintenance Due List (MDL) to allow for planning of asset availability.
I. PASSENGER AND SURVIVAL VEST MAINTENANCE
1. Post-Flight Cleaning Vest Bladders The steps in the following table shall be used for the post-flight cleaning of passenger and survival vest bladders.
STEP ACTION
1 Remove the air bladder from the container or case.
2 Prepare a solution of cleaning compound consisting of one part compound to three parts water.
3 Apply the cleaning solution to soiled area with a spray or swab.
4 Allow the solution to remain on the surface for several minutes, and then agitate with soft brush or rag.
5 Rinse the surface thoroughly with water; wipe with a cloth or sponge. Repeat this application until surface is free from all solution.
6 Dry the raft with lint-free cloth.
2. Post-Flight Cleaning of Vest Cases and Bladder Containers The steps in the following table shall be used for the post-flight cleaning of vest cases and bladder containers.
STEP ACTION
1 Remove the air bladder from the vest shell or bladder container.
2 Close the slide fasteners of the vest shell or bladder container to prevent damage to the fabric.
3 Using mild soap and warm water, launder by hand.
4 Thoroughly rinse with warm, fresh, tap water.
5 Gently squeeze out the excess water; do not wring.
6 Hang the vest shell or bladder container on wooden hanger to air-dry in a well-ventilated area.
3. Replacement of Nylon Cord Replacement of the nylon cord securing the bladder assembly to the casing shall be performed in accordance with the applicable equipment MSR MPC.
J. MD1127 ROTARY WING PASSENGER VEST
1. Configuration The MD1127 rotor wing passenger vest is a constant-wear vest that weighs
2.2 pounds (with inflation cylinder installed). It is designed to provide passenger emergency flotation on Coast Guard rotary wing aircraft. When inflated, the MD1127 provides sufficient buoyancy to turn an unconscious person face-up. When fully inflated, the MD1127 provides a minimum effective buoyancy of 35 pounds. The MD1127 is universal in size and is designed to fit most adults. This can be worn over bulky outer clothing, and has adjustable nylon waist belts which secure an easy-to-wear position, allowing for maximum freedom of movement.
a. Flotation Bladder Assembly The MD1127 incorporates a dual-chamber inflatable cell constructed from polyurethane-coated nylon, which is separated by an internal floating baffle. The floating baffle allows either chamber to fully inflate the lifevest.
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b. Inflation Assemblies The MD1127 dual-chamber inflatable cell design incorporates a primary inflation cell accessed from a CO2 inflation system and an oral inflation system, along with a secondary cell accessed from its own oral inflation system.
c. Vest/Flotation Casing The lifevest is styled as a protective collar fitted around the neck and front chest. The protective collar is constructed from 6-ounce Nomex®.
The outer shell of the MD1127 is not integral with the inflation cell, but acts as a cell enclosure by opening the Velcro® seals; when deflated, the inflation cell is folded and placed back into the cell enclosure.
d. Survival Equipment A signal whistle, emergency strobe signal, and a signal mirror are located in the equipment pocket, left side on the waist belt (when worn).
2. Function The CO2 inflation assembly pull lanyard is identified by five red plastic beads that extend below the inflation assembly protective flap on the right side of the vest (when worn). In case the primary inflation cell has been punctured or fails to inflate, the lifevest may be inflated orally by the secondary inflation cell, inside protective collar, left side of vest (when worn). The oral inflation systems consist of an oral tube and oral valve. The oral inflation valve is normally closed and is opened by depressing the mouthpiece when inflating or deflating.
3. Inspection Interval The following are inspection intervals for the MD1127 rotor wing passenger vest:
a. Acceptance On original issue, when received from supply, or accepted from another unit for permanent custody
b. Leak Test Inspection Intervals not to exceed 180 days
c. Functional Test On acceptance and at intervals that coincide with every sixth leak test, or every 36 months
d. Routine Inspections Routine inspections will be performed as follows:
(1) MD1127 Preflight Check Use the steps in the following table to perform a preflight inspection of an MD1127 passenger vest:
STEP ACTION
1 Have qualified personnel fit the MD1127 passenger vest to the wearer and describe proper use.
2 Open the inflation device cover and ensure that there is a CO2 cylinder installed securely into the inflation valve.
3 Visually check that the inflation lever is in armed position and assure the presence and security of yellow breakaway thread securing the inflation lever to the inflation valve body.
4 Check that beaded inflation lanyard is securely attached to the inflation lever and that the webbing/Velcro® tab is attached to the hook tape sewn inside inflation device cover.
WARNING
ENSURE THAT INFLATION LANYARD IS READILY ACCESSIBLE, EXTENDING FROM
THE PROTECTIVE COVER.
5 Open the oral inflation valve cover and ensure that locking ring on inflation valve is in the locked position. Close oral inflation flap.
6 Visually inspect the Velcro® closure tape on the flotation bladder casing for any separation.
If separation is found, close the separation by pressing the Velcro® tape on each side of the bladder cover together.
7 Inventory survival equipment and inspect for proper attachment and location.
8 Noted discrepancies should be reported to Maintenance Control/AST shop and the MD1127 passenger vest shall be removed from service until repaired or replaced.
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4. MD1127 Rotor Wing Passenger Vest Repairs The MD1127 shall be maintained and repaired in accordance with the applicable MPC. For determination of repairability, refer to Aviation Life Support Equipment Systems Manual, COMDINST M13520.1 (series), Chapter 2, Paragraph K.
K. AV-35 FIXED WING PASSENGER VEST The passenger lifevest is an airline-style lifevest in a vacuum-sealed package. These are sealed at the manufacturer and are not opened for inspection at the unit level.
CAUTION
THE AV-35A, AV-35H, AND FV-35/3505-401 ARE THE ONLY AU-
THORIZED AIRLINE-STYLE PASSENGER LIFE PRESERVERS
FOR USE ON COAST GUARD FIXED WING AIRCRAFT.
1. Configuration The AV-35 life preserver is stored on fixed wing aircraft and is not a constant-wear vest. It is a CO2-inflated, heat-sealed, dual-chamber configuration equipped with oral inflators for each chamber. This lifevest is manufactured in accordance with TSO-C13f Adult-Child category and has a buoyancy of 35 pounds (minimum) for a person weighing 35 pounds and over. A survivor locator light is attached to the upper edge of the flotation cell. The battery is suspended below the bottom edge of the flotation cell.
2. Function Two inflators are operated by pulling each red plastic handle labeled JERK TO INFLATE. Actuation of the inflation valve punctures the CO2 cartridge and inflates the two buoyancy chambers through the manifold in the CO2 inflation assembly. Secondary inflation of each buoyancy chamber can be accomplished through the oral inflators if one or both of the primary inflation systems fails to operate, or if additional pressure is required.
3. Inspection Intervals The following inspections are to be accomplished using the appropriate
MSR MPC:
a. Acceptance On original issue, when received from supply, or accepted from another unit for permanent custody.
b. Visual Inspection Due every 12 months, not to exceed 60 months from date of manufacture. If date of manufacture is 60 months or greater, return vest in accordance with MPC 256206.0.
c. Leak Inspection Every 60 months from date of manufacture (located on inside back of sealed bag).
4. Modifications and Repairs No modifications are required nor authorized for the fixed wing passenger vest. Required repairs will be accomplished at the manufacturer in accordance with the appropriate MSR MPC.
L. LPU-26/P SURVIVAL VEST
1. Configuration The LPU-26/P survival vest is designed for constant wear, and is used by fixed wing aircrew members. It weighs approximately 5 pounds, including equipment, and provides a minimum of 22 pounds of buoyancy. The LPU-26/P survival vest consists of the following subassemblies:
a. Flotation Bladder Assembly The LPU-26/P flotation bladder consists of a single bladder with two (upper and lower) chambers.
b. Inflation Assemblies The upper and lower chambers are inflated mechanically through CO2 inflation valves, or orally by means of built-in oral inflation tubes.
c. Vest/Flotation Casing The vest/flotation casing is constructed of lightweight blue Nomex® mesh with a belt assembly that contains the pocket subassemblies for individual survival equipment stowage. The bladder assembly is attached to the vest/flotation casing with gutted Type III nylon cord. The LPU-26/P comes in one size and is secured to the wearer with a slide fastener closure and an adjustable belt assembly.
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d. Survival Equipment Two pockets are provided (one on the left of the wearer and one on the right) for stowage of survival equipment. The type and quantity of survival equipment shall be in accordance with the applicable MPC.
2. Function Inflation of the LPU-26/P is either by a CO2 cartridge contained in the vest or by the built-in oral inflation valve. After aircraft egress, inflate the LPU-26/P by pulling down and slightly outward on the CO2 inflation valve assembly pull toggle. The oral inflation tubes should be used to top off an inflated preserver, or to inflate a preserver if the inflation valve assembly malfunctions.
3. Inspection Intervals The following are inspection intervals for the LPU-26/P survival vest:
a. Acceptance On original issue, when received from supply, or accepted from another unit for permanent custody
b. Leak Test Inspection Intervals not to exceed 180 days
c. Functional Test On acceptance and at intervals that coincide with every sixth leak test, or every 36 months
d. Routine Inspections Routine inspections will be performed as follows:
(1) LPU-26/P Preflight Check Use the steps in the following table to perform a preflight check of the LPU-26/P:
STEP ACTION
1 Check exposed metal/plastic parts for corrosion and/or damage.
2 Check vest/flotation casing for wear, tears, abrasions, and contamination (oil, fuel, etc.).
3 Check attachment of inflation lanyard safety tie.
4 Check survival equipment for proper attachment, location, and quantity.
WARNING
ENSURE THAT INFLATION PULL TOGGLE IS READILY ACCESSIBLE, EXTENDING FROM
THE FLOTATION CASING.
5 Report noted discrepancies to AST shop supervisor or Maintenance Control.
(2) LPU-26/P Weekly Check Use the steps in the following table to perform a weekly check of the LPU-26/P survival vest:
STEP ACTION
1 Check exposed metal/plastic parts for corrosion and/or damage.
2 Check vest/flotation casing for wear, tears, abrasions, security of stitching, and contamination (oil, fuel, etc.).
3 Check attachment of inflation lanyard safety tie. If missing, replace. The lanyard safety tie may be replaced without removing the vest from service.
4 Check inflation assembly and breakaway thread. Ensure CO2 cartridge is secured.
5 Check survival equipment for proper attachment, location, and quantity.
WARNING
ENSURE THAT INFLATION PULL TOGGLE IS READILY ACCESSIBLE, EXTENDING FROM
THE FLOTATION CASING.
6 Report noted discrepancies to AST shop supervisor or Maintenance Control.
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4. LPU-26/P Repairs The LPU-26/P shall be maintained and repaired in accordance with the applicable MPC. For determination of repairability, refer to Aviation Life Support Equipment Systems Manual, COMDINST M13520.1 (series), Chapter 2, Paragraph K.
M. LPU-27/FW SURVIVAL VEST
1. Configuration The LPU-27/FW survival vest is designed for constant wear by fixed wing aircrew members. The design incorporates a low-profile flotation collar while eliminating common problems such as collar rub, neck fatigue, and hindered range of motion while wearing a flight helmet. It weighs 2.63 pounds (without survival items) and provides a minimum of 44 pounds of buoyancy. The LPU-27/FW survival vest consists of the following subassemblies:
a. Flotation Bladder Assembly The LPU-27/FW flotation bladder consists of a single bladder with two (upper and lower) chambers.
b. Inflation Assemblies The upper and lower chambers are inflated mechanically through CO2 inflation valves, or orally by means of built-in oral inflation tubes.
c. Vest/Flotation Casing The vest/flotation casing is a combination of fire-retardant webbing and Nomex®/Kevlar® hybrid cloth, providing robust wear resistance and fire retardancy. It comes in one size, has a built-in survivor locator light and whistle, and is secured to the wearer with a slide fastener closure and adjustable belt and leg strap assemblies.
d. Survival Equipment Four pockets are attached using the MOLLE pocket mounting system for stowage of survival items. The type and quantity of survival equipment shall be in accordance with the applicable MPC.
2. Function Inflation of the LPU-27/FW is either by one 40-gram CO2 cartridge contained in the vest or by the built-in oral inflation valve. After aircraft egress, inflate the vest by pulling down and slightly outward on the CO2 inflation valve assembly pull toggle. The oral inflation tubes should be used to top off an inflated bladder, or to inflate the vest if the inflation valve assembly malfunctions.
3. Inspection Intervals The following are inspection intervals for the LPU-27/FW survival vest:
a. Acceptance On original issue, when received from supply, or accepted from another unit for permanent custody
b. Leak Test Inspection Intervals not to exceed 180 days
c. Functional Test On acceptance and at intervals that coincide with every sixth leak test, or every 36 months
d. Routine Inspections Routine inspections will be performed as follows:
(1) LPU-27/FW Preflight Check Use the steps in the following table to perform a preflight check of the LPU-27/FW survival vest:
STEP ACTION
1 Check exposed metal/plastic parts for corrosion and/or damage.
2 Check vest/flotation casing for wear, tears, abrasions, and contamination (oil, fuel, etc.).
3 Check attachment of inflation lanyard.
4 Check survival equipment for proper attachment, location, and quantity.
WARNING
ENSURE THAT INFLATION PULL TOGGLE IS READILY ACCESSIBLE, EXTENDING FROM
THE FLOTATION CASING.
5 Report noted discrepancies to AST shop supervisor or Maintenance Control.
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(2) LPU-27/FW Weekly Check Use the steps in…
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