SVB.pdf

UNCLASSIFIED

BATTLE MANAGEMENT SYSTEM (BMS)

105MM GUN WEAPON SYSTEM (GWS)

TRAINABLE GUN MOUNT (TGM) B/L 3.1.3

PRESSURE SEAL CAGE MODIFICATION

SERVICE BULLETIN (SVB)

SVB101601-02-A

29 July 2019

Naval Surface Warfare Center, Dahlgren Division Platform Integration Division

Weapons Control and Integration Department Dahlgren, VA 22448-5100

This document has been authored by the BMS program.

This document has been reviewed and approved by appropriate personnel.

Inquiries and requests associated with this document can be submitted to:

W_DLGR_NSWC_BMS_NIPR@navy.mil W_DLGR_NSWC_BMS@navy.smil.mil

DISTRIBUTION STATEMENT D. Distribution authorized to the Department of Defense and U.S. DoD contractors only (Critical Technology) 29 July 2019. Other requests shall be referred to Naval Surface Warfare Center, Dahlgren Division, BMS PM in H40, Dahlgren, VA 22448.

WARNING - This document contains technical data whose export is restricted by the Arms Export Control Act (Title 22, U.S.C. Sec. 2751et 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 OPNAVINST 5510.161.

DESTRUCTION NOTICE - For unclassified, limited distribution documents destroy by any method that will prevent disclosure of contents or reconstruction of the document.

Distribution Statement D 2 Export-Controlled Data

UNCLASSIFIED

RECORD OF CHANGES

Revision Date Description

REV - 03/15/2019 Signatures

REV-A 07/29/2019 Signatures

Distribution Statement D 3 Export-Controlled Data

UNCLASSIFIED

SERVICE BULLETIN WRITTEN BY

Name/Title Signature Date

Signatures on file

LEAD ENGINEER APPROVAL

Name/Title Signature Date

Signatures on file

CHIEF ENGINEER APPROVAL

Name/Title Signature Date

Signatures on file

AFLCMC/WIU ENGINEER APPROVAL

Name/Title Signature Date

Signatures on file

AFLCMC/WIU PROGRAM OFFICE APPROVAL

Name/Title Signature Date

Signatures on file

SERVICE BULLETIN COMPLETED BY

Name/Title Signature Date

Signatures on file

Distribution Statement D 4 Export-Controlled Data

UNCLASSIFIED

TABLE OF CONTENTS

SECTION 1. SCOPE

1.1 INTRODUCTION

1.2 PURPOSE

1.3 SYSTEM, SUBSYSTEM, OR EQUIPMENT

1.4 ORDER OF PRECEDENCE

SECTION 2. PLANNING INFORMATION

2.1 EFFECTIVITY

2.2 COMPLIANCE

2.3 APPROVAL

2.4 MANPOWER

2.5 WEIGHT AND BALANCE

2.6 ELECTRICAL LOAD DATA

2.7 SOFTWARE ACCOMPLISHMENT SUMMARY

2.8 RECORD OF COMPLIANCE

2.9 PUBLICATIONS AFFECTED

SECTION 3. REFERENCE DOCUMENTS

3.1 GOVERNMENT DOCUMENTS, DRAWINGS, AND PUBLICATIONS

3.1.1 Standards, Specifications, and Handbooks

3.1.2 Other Government Documents, Drawings, and Publications

SECTION 4. GENERAL REQUIREMENTS

4.1 STANDARDS

4.2 PERSONNEL

4.3 TOOLS

4.4 PARTS

4.5 HARDWARE

SECTION 5. SAFETY WARNING

SECTION 6. DETAILED PROCEDURES

6.1 PRESSURE SEAL CAGE INSTALLATION

6.1.1 PRESSURE SEAL DRILL JIG 115209ASSEMBLY

6.1.2 FORWARD PRESSURE SEAL VERTICAL SUPPORT 102237

MODIFICATION AND INSTALLATION OF INBOARD PRESSURE SEAL CAGE

BRACKET 115472

6.1.3 PRESSURE BOOT SHIM ASSEMBLY 115442

6.1.4 PRESSURE SEAL CAGE BRACKET INSTALLATION

Distribution Statement D 5 Export-Controlled Data

UNCLASSIFIED

TABLE OF FIGURES

Figure 1: Pressure Seal Drill Jig 115209 and Drill Bushing 115385-2 Figure 2: Drill Jig 115209 Inner Surface Flush with Forward Pressure Seal Vertical Support 102237 Figure 3: Drill Jig 115209 Top Surface Flush with Forward Pressure Seal Vertical Support 102237 Figure 4: Drill Jig 115209 Outboard Surface Flush with Forward Pressure Seal Vertical Support 102237 (View looking out toward Pressure Seal. Components Not Shown for Clarity) Figure 5: Install Inboard Pressure Seal Cage Bracket 115472 to Forward Pressure Seal Vertical Support 102237 Figure 6: Pressure Boot Shim Assembly 115442 Figure 7: Remove eight (8) NAS517-6-10 screws from Pressure Seal Washer Plate 109730 Figure 8: Install Pressure Boot Shim Assembly 115442, Internal View (Upper Support 102151 is not shown for clarity) Figure 9: Install Pressure Boot Shim Assembly 115442, External View Figure 10: Install two (2) Spring Loaded Rod Assemblies 115265-3 Figure 11: Installed Spring Loaded Rod Assemblies 115265-3

LIST OF TABLES

No table of figures entries found.

Distribution Statement D 6 Export-Controlled Data

UNCLASSIFIED

SECTION 1. SCOPE

1.1 INTRODUCTION

This document establishes a protocol by which the Battle Management System (BMS) 105mm Gun Weapon System (GWS) Trainable Gun Mount (TGM) is modified for installation of the Pressure Seal Cage. The Forward Vertical Pressure Seal Support 102237 is modified using the Pressure Seal Drill Jig 115209. Then it provides the proper procedures for installing the Outboard Pressure Seal Cage Bracket 115444, Inboard Pressure Seal Cage Bracket 115472, Seal Interface Plate (.25) Upper Shim 115443, and Spring Loaded Rod Assemblies 115265-3 with the associated hardware. The Outboard Pressure Seal Cage Bracket 115444, Inboard Pressure Seal Cage Bracket 115472, Seal Interface Plate (.25) Upper Shim 115443, and Spring Loaded Rod Assemblies 115265-3 are products of the Naval Surface Warfare Center Dahlgren Division

(NSWCDD).

1.2 PURPOSE

The purpose of this document is to instruct the user on the proper method to modify the Pressure Interface Installation Kit 110048 to discourage 105mm Pressure Seal 107196 from binding with recoiling components of the 105mm Gun Unit 110054 during actuation of the 105mm Trainable Gun Mount.

1.3 SYSTEM, SUBSYSTEM, OR EQUIPMENT

The BMS 105mm GWS B/L 3.1.3 TGM Pressure Seal Cage Modification Service Bulletin (SVB) consists of the following equipment:

a) Pressurization Interface Installation Kit 110048-1 or 110048-2

1) Pressurization Interface Kit 110055

a. Seal Interface Plate (.25) Upper Shim 102232-1

b. Pressure Boot Shim Assembly 115442

c. Spring Loaded Rod Assembly 115265-3

b) Cradle Assembly 102073

1) Pressure Seal Assembly 101606

a. Inboard Pressure Seal Cage Bracket 115472

1.4 ORDER OF PRECEDENCE

Every effort has been made to keep this document current; however, the latest revision of drawings and other technical documentation relating to the BMS 105mm GWS B/L 3.1.3 TGM Pressure Seal Cage Modification Service Bulletin (SVB) that differs from the instructions in this procedure shall take precedence unless otherwise stated in this text, or when the drawings or documentation are older than this document.

Distribution Statement D 7 Export-Controlled Data

UNCLASSIFIED

SECTION 2. PLANNING INFORMATION

2.1 EFFECTIVITY

All AC-130J and AC-130W aircraft.

2.2 COMPLIANCE

The incorporation of this service bulletin is MANDATORY. Perform when aircraft is available for maintenance.

2.3 APPROVAL

The instructions contained in this service bulletin have been approved by the engineering authority of CAD-D.

2.4 MANPOWER

The following is for planning purposes only:

Estimated man-hours for installation: 3

2.5 WEIGHT AND BALANCE

The change to weight and balance is negligible.

2.6 ELECTRICAL LOAD DATA

Not applicable

2.7 SOFTWARE ACCOMPLISHMENT SUMMARY

Not applicable

2.8 RECORD OF COMPLIANCE

Upon completion of this service bulletin, make an appropriate maintenance entry to document the completion of this service bulletin.

2.9 PUBLICATIONS AFFECTED

- Battle Management System (BMS) 105MM Gun Weapon System (GWS) Trainable Gun Mount (TGM) Pressurization Interface Assembly and Installation Procedure.

Distribution Statement D 8 Export-Controlled Data

UNCLASSIFIED

SECTION 3. REFERENCE DOCUMENTS

Technicians performing the procedures described in this document should follow all required maintenance precautions and procedures described in any related documents, including but not limited to those listed herein.

3.1 GOVERNMENT DOCUMENTS, DRAWINGS, AND PUBLICATIONS

3.1.1 Standards, Specifications, and Handbooks

TO 1-1A-14 Heating Tools, Installation and Repair Practices For Aircraft Electric And

Electronic Wiring, May 2007

3.1.2 Other Government Documents, Drawings, and Publications

The following Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract.

102237 Forward Vertical Pressure Seal Support

101606 Pressure Seal Assembly

102232 Upper Seal Interface Plate Shim

110048 Pressurization Interface Installation

113552 Blast Diffuser And Pressurization Interface Installation

SK115442 Pressure Boot Shim Assembly

SK115443 Seal Interface Plate (.25) Upper Shim

SK115444 Outboard Pressure Seal Cage Bracket

SK115472 Inboard Pressure Seal Cage Bracket

SK115265-3 Spring Loaded Rod Assembly

Battle Management System (BMS) 105mm Gun Weapon System (GWS) Platform Installation Kit (PIK) Installation and Removal Procedure

Battle Management System (BMS) 105mm Gun Weapon System (GWS) Trainable Gun Mount (TGM) Stow Procedure

Distribution Statement D 9 Export-Controlled Data

UNCLASSIFIED

SECTION 4. GENERAL REQUIREMENTS

4.1 STANDARDS

Lace tying and safety wiring will be completed in accordance with (IAW) TO 1-1A-14, Heating Tools, Installation and Repair Practices for Aircraft Electronic and Electronic Wiring.

4.2 PERSONNEL

Before beginning assembly, be sure to coordinate a plan for personnel and the site. This plan should include

a) Tool control

b) Foreign object debris (FOD) control

c) Machine shop availability

4.3 TOOLS

NOTE: A service bulletin kit is provided for installation. Return all tools provided to NSWCDD.

The following tools are required for the completion of this service bulletin:

PART NAME PART NUMBER

TOOL KIT: GENERAL MECHANICS 08292-GOV44224

TORQUE WRENCH (0-175 FT-LB) TER175FU

PRESSURE SEAL DRILL JIG 115209

DRILL BUSHING 115385-2

TORQUE STRIPE 101594

DRILL BIT, #7

ELECTRIC DRILL

DEBURRING TOOL

VACUUM

C-CLAMPS N/A

4.4 PARTS

NOTE: A service bulletin kit is provided for installation. Return all permanently removed hardware to NSWCDD.

The following parts are required for the completion of this service bulletin:

PART NAME PART NUMBER QTY

SEAL INTERFACE PLATE (.25) UPPER SHIM SK115443 1

OUTBOARD PRESSURE SEAL CAGE BRACKET SK115444 1

INBOARD PRESSURE SEAL CAGE BRACKET SK115472 1

Distribution Statement D 10 Export-Controlled Data

UNCLASSIFIED

SPRING LOADED ROD ASSEMBLY SK115265-3 2

4.5 HARDWARE

NOTE: A service bulletin kit is provided for installation. Return all permanently removed hardware to NSWCDD.

The following hardware is required for the completion of this service bulletin:

PART NAME PART NUMBER QTY

SCREW, HEX HEAD, CRUCIFORM RECESS, FULL

THREAD, ALLOY STEEL, .1900-32 UNJF-3A, 1.000

INCH LONG, NOT DRILLED HEAD

NAS1801-3-16 4

WASHER, FLAT, CARBON STEEL, CADMIUM

PLATE, NO. 10 SIZE, 0.063 THICK

NAS1149F0363P 4

WASHER, FLAT, CARBON STEEL, CADMIUM

PLATE, .250 NOMINAL DIAMETER, 0.063 THICK

NAS1149F0463P 2

NUT, SELF-LOCKING, CADMIUM PLATED, .1900-

32UNJF-3B, NOT DRY FILM LUBRICATED

MS21042-3 4

SCREW, HEX HEAD, CRUCIFORM RECESS, ALLOY

STEEL, .2500-28 UNJF-3A, .625 LENGTH, DRILLED

HEAD

NAS1801-4D10 2

SCREW, 100 DEG FLUSH HEAD, ALLOY STEEL,

.3750-24UNJF, .625 GRIP

NAS517-6-10 16

WIRE, SAFETY, CRES, .032 NOM DIA MS20995C32 AR

ADHESIVE, THREAD LOCKING AN0321 AR

Distribution Statement D 11 Export-Controlled Data

UNCLASSIFIED

SECTION 5. SAFETY WARNING

CAUTION: AN0321 Thread Locking Compound may cause eye, skin, and respiratory irritation.

Distribution Statement D 12 Export-Controlled Data

UNCLASSIFIED

SECTION 6. DETAILED PROCEDURES

6.1 PRESSURE SEAL CAGE INSTALLATION

6.1.1 PRESSURE SEAL DRILL JIG 115209ASSEMBLY

1) Modify Pressure Seal Drill Jig 115209 by installing four (4) Drill Bushing 115385-2.

Figure 1: Pressure Seal Drill Jig 115209 and Drill Bushing 115385-2

6.1.2 FORWARD PRESSURE SEAL VERTICAL SUPPORT 102237 MODIFICATION

AND INSTALLATION OF INBOARD PRESSURE SEAL CAGE BRACKET 115472

1) Either uninstall 105mm GWS TGM IAW Battle Management System (BMS) 105mm Gun Weapon System (GWS) Platform Installation Kit (PIK) Installation and Removal Procedure or manually actuate the TGM to an optimal position using the actuator IAW Battle Management System (BMS) 105mm Gun Weapon System (GWS) Trainable Gun Mount (TGM) Stow Procedure.

NOTE: Actuation of the TGM also the drilling to occur without moving the gun inboard.

2) Clamp Pressure Seal Drill Jig 115209 to Forward Pressure Seal Vertical Support 102237 using two (2) C-Clamps.

NOTE: Ensure four (4) Drill Bushings 115385-2 are present in Drill Jig 115209.

115209

115385-2

Distribution Statement D 13 Export-Controlled Data

Figure 2: Drill Jig 115209 Inner Surface Flush with Forward Pressure Seal Vertical Support 102237

a) Wipe the outboard surface of the Forward Pressure Seal Vertical Support 102237 and ensure it is free of any debris, oil, or dirt that will prevent the drill jig from firmly seating on the surface. Ensure inner surface of Drill Jig 115209 is fully seated on the Forward Pressure Seal Vertical Support 102237.

b) Wipe the lower surface of the Pressure Seal Cross Beam Support 102235 and ensure it is free of any debris, oil, or dirt that will prevent the drill jig from firmly seating on the surface. Ensure top surface of Drill Jig 115209 is flush with the bottom of the Pressure Seal Cross Beam Support 102235.

Distribution Statement D 14 Export-Controlled Data

UNCLASSIFIED

Figure 3: Drill Jig 115209 Top Surface Flush with Forward Pressure Seal Vertical Support 102237

c) Wipe the aft surface (surface closest to the gun barrel) of the Forward Pressure Seal Vertical Support 102237 and ensure it is free of any debris, oil, or dirt that will prevent the drill jig from firmly seating on the surface. Ensure outboard surface of Drill Jig 115209 is flush with Forward Pressure Seal Vertical Support 102237.

Figure 4: Drill Jig 115209 Outboard Surface Flush with Forward Pressure Seal Vertical Support 102237 (View looking out toward Pressure Seal. Components Not Shown for Clarity)

3) Using #7 size drill bit (.201” Nominal Diameter), drill a through hole using Drill Bushings 115385-2. This should be repeated for each Drill Bushing 115385-2, for four

(4) holes total.

4) Remove C-Clamps and Drill Jig 115209.

5) Using Deburring tool, clean up newly drilled holes. Ensure that the surfaces are smooth after deburring.

6) Vacuum up all foreign objects or debris created from work.

7) Install Inboard Pressure Seal Cage Bracket 115472 to Forward Pressure Seal Vertical

Support 102237 by installing four (4) NAS1801-3-16 bolts, four (4) NAS1149F0363P washers, and four (4) MS21042-3 locking nuts.

8) Torque bolts to 80-90 inch pounds (in-lbs).

9) Apply Torque Stripe 101594 on four (4) NAS1801-3-16 bolts and four (4) MS21042-3 locking nuts.

Distribution Statement D 15 Export-Controlled Data

Figure 5: Install Inboard Pressure Seal Cage Bracket 115472 to Forward Pressure Seal Vertical Support 102237

6.1.3 PRESSURE BOOT SHIM ASSEMBLY 115442

1) Install Outboard Pressure Seal Cage Bracket 115444 to Seal Interface Plate (.25) Upper

Shim 115443 using two (2) NAS1801-4D10 bolts and NAS1149F0463P washers.

2) Torque bolts to 80-90 inch pounds (in-lbs).

3) Install MS20995C32 safety wire to bolts IAW NASM33540.

NOTE: This assembly has now become Pressure Boot Shim Assembly 115442.

Distribution Statement D 16 Export-Controlled Data

Figure 6: Pressure Boot Shim Assembly 115442

6.1.4 PRESSURE SEAL CAGE BRACKET INSTALLATION

1) Remove current Seal Interface Plate Upper Shim 102232-1 by removing eight (8)

NAS517-6-10 screws installed on Pressure Seal Washer Plate 109730. Discard NAS517- 6-10 screws.

NOTE: Retain Pressure Seal Washer Plate 109730 to be installed afterwards.

NOTE: If necessary, loosen (not remove) the eight (8) NAS517-6-10 bolts on the lower Pressure Seal Washer Plate 106996 to remove the Seal Interface Plate Upper Shim 102232-1.

Distribution Statement D 17 Export-Controlled Data

Figure 7: Remove eight (8) NAS517-6-10 screws from Pressure Seal Washer Plate 109730

2) Install Pressure Boot Shim Assembly 115442 using new eight (8) NAS517-6-10 screws, coated with AN0321 thread locking compound.

NOTE: Ensure Pressure Seal Washer Plate 109730 is installed.

Figure 8: Install Pressure Boot Shim Assembly 115442, Internal View (Upper Support 102151 is not shown for clarity)

Distribution Statement D 18 Export-Controlled Data

Figure 9: Install Pressure Boot Shim Assembly 115442, External View

3) Torque NAS517-6-10 screws to 32-37 foot pounds (ft-lbs).

NOTE: If lower bolts were loosened, replace worn hardware as necessary, sequentially as to not disrupt alignment of lower pressure support. Ensure bolts are properly coated in AN0321 thread locking compound then torque NAS517-6-10 screws to 32-37 ft-lbs.

4) Install two (2) Spring Loaded Rod Assemblies 115265-3 by compressing the Compression Spring 109825 to Outboard Pressure Seal Cage Bracket 115444. Then while compressed, insert the other end into the Inboard Pressure Seal Cage Bracket 115472.

NOTE: Ensure the smaller outer diameter end of the Spring Loaded Rod Assemblies 115265-3 is inserted into the Outboard Pressure Seal Cage Bracket 115444.

Distribution Statement D 19 Export-Controlled Data

Figure 10: Install two (2) Spring Loaded Rod Assemblies 115265-3

Figure 11: Installed Spring Loaded Rod Assemblies 115265-3

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