106_DD_LNM_10R0.pdf

(28 December 2009 / Revision-0)

USCGC MORRO BAY (WTGB-106)

140 FOOT ICEBREAKING TUG

SPECIFICATIONS FOR DRY DOCK REPAIRS

Developed By:

Louis Mikedis

Surface Forces Logistics Center WMEC Product Line 300 E. Main Street, Suite (600) Norfolk, VA 23510-9102

USCGC MORRO BAY (WTGB-106) DRYDOCK AVAILABILITY 2010

Page i (Rev-0)

TABLE OF CONTENTS

Work Item Title Page

List of Sketches iii

Revisions Record iv

Consolidated List of References v

Consolidated List of Government-furnished Property x

Consolidated List of Critical Inspection Items xi

Specification Feedback xii

Principal Characteristics xiii

General Requirements 1

1 Perform Ultrasonic Thickness Measurements –Hull Plating 8

2 Inspect Bubbler Channels 10

3 Preserve Bubbler Channels 12

4 Inspect and Perform Structural Repairs In Chain Locker 13

5 Remove, Inspect, and Reinstall Propeller Shaft 16

6 Overhaul Shaft Seal Assembly 21

7 Remove, Inspect, and Reinstall Propeller 24

8 Renew Depth Indicating Transducer 28

9 Clean Shipboard Ventilation Systems 31

10 Overhaul and Renew Sea Valves 33

11 Sea Strainers, Clean and Inspect and Renew Mounting Brackets 38

12 Remove, Inspect and Reinstall Rudder Assembly 42

Page ii (Rev-0)

13 Perform Anchor Windlass Maintenance 45

14 Inspect Anchor, Anchor Chain, and Ground Tackle 48

15 Preserve Underwater Body – “100%” 50

16 Preserve Main Mast, Fore Mast, and Stub Mast 52

17 Routine Drydocking 56

18 Provide Temporary Logistics 60

19 Flying Bridge, Inspect and Repair 63

20 Structural Repairs 66

21 Remove Through Hull Pipe Penetration 69

22 Waste Oil Tank Structural Repairs 71

23 Fuel Oil Tank Vent Structural Repairs 73

24 Renew Mast Cable Way Standoffs 75

25 Renew Ventilation System Insulation 77

26 Renew Section of Ventilation Ducting 79

27 Preserve Bilge Surfaces In Motor Room 82

28 Install New Deck Covering System In Chief’s Head 84

29 Reseal Latex Terrazzo Deck Covering System 86

30 Renew Cathodic Protection System 88

31 Perform Minor Repairs and Reconditioning of Propeller 91

Page iii (Rev-0)

List of Sketches

Work Item Sketch Number Page

This section is not applicable to this package.

Page iv (Rev-0)

Revisions Record

This page is used to record specification revisions, which may have occurred subsequent to a Revision 0 (Rev-0) package.

Information listed is intended to provide contractors and field unit personnel a means to ensure all the current specification revision pages are present when reviewing or utilizing this specification package.

DATE REV# WORK ITEM# CHANGES MADE

NOTE: All work item and paragraph numbers listed above for a given revision correspond to same numbers in the previous revision. This revised specification is self-contained with all of the above listed changes incorporated.

Page v (Rev-0)

Consolidated List of References

The below-listed documents form a part of this specification to the extent specified herein. Approval/publication dates or revision dates/numbers are also identified, to ensure that same document versions are used at time of specification writing and during contract execution. Electronic copies of the latest Editions of MLCA Standard Specifications are available on the Internet and may be accessed at the following Internet Uniform Resource Locator (URL) address:

http://www.uscg.mil/mlclant/vdiv/standard_specifications.asp.

Guidance for obtaining copies of all other documents referenced herein is provided in the solicitation.

Order of precedence. In the event of conflicts between text of this specification and the applicable references specified herein, order of precedence shall be in accordance with MLCA Standard Specification 0000_STD, paragraph 3.2 (Order of precedence), unless otherwise specified by the Contracting Officer (KO). The Contractor shall immediately notify the KO in writing of any perceived conflicts contained herein. Nothing in these documents, however, supersedes applicable laws and regulations, unless a specific exemption has been obtained.

FEDERAL AND MILITARY SPECIFICATIONS AND STANDARDS

DOD-STD-2003, Dec 1990, Electric Plant Installations, Standard Methods FOR surface Ships and Submarines, Fig. 4D6 – 4D8, Protection of Cables on Mast

MIL-D-3134, Sep 1989, Deck Covering Materials

MIL-D-16791, Jan 1993, Detergents, General Purpose (Liquid, Nonionic)

MIL-I-742F, Apr 1981, Insulation Board, Thermal, Fibrous Glass

MIL-STD-167-1, Nov 2005, Mechanical Vibrations of Shipboard Equipment (Type I - Environmental and Type II - Internally Excited)

MIL-PRF-24613, Dec 1990, Deck Covering Materials, Interior, Cosmetic Polymeric

MIL-PRF-16173, 2006, Corrosive Preventive Compound, Solvent Cutback, Cold Application

Page vi (Rev-0)

OTHER GOVERNMENT DOCUMENTS, DRAWINGS, AND PUBLICATIONS

DOCUMENTS

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 0000_STD, 2006 Edition, General Requirements

Coast Guard Maintenance and Logistics Command Atlantic (MLCA) Standard Specification 0740_STD, 2004 Edition, Welding and Allied Processes

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 1001_STD, 2004 Edition, Temporary Hull Accesses

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 3141_STD, 2004 Edition, Overhaul Electrical Rotating Machines

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 5000_STD, 2004 Edition, Auxiliary Machinery Systems

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 6341_STD, 2004 Edition, Renew Deck Covering Systems

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 8634_STD, 2004 Edition, Drydocking

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 8635_STD, 2004 Edition, Provide Temporary Logistics

DRAWINGS

Coast Guard Drawing 101 WTGB 111-001, Rev R, Shell Expansion

Coast Guard Drawing 101 WTGB 114-002, Rev L, Bubbler Structure

Coast Guard Drawing 101 WTGB 114-003, Rev G, Shell Guards

Coast Guard Drawing 101 WTGB 141-001, Alt K, First Platform, Plating and Framing

Coast Guard Drawing 101 WTGB 150-001, Rev N, Deck House, Plating and Framing

Page vii (Rev-0)

Coast Guard Drawing 101 WTGB 171-001, Rev-, Fore Mast

Coast Guard Drawing 101 WTGB 171-002, Rev-, Main Mast and Boom

Coast Guard Drawing 101 WTGB 243-001, Rev T, Shafting and Bearing Arrangement and Details

Coast Guard Drawing 101 WTGB 243-002, Rev -, Propulsion Shafting Arrangement

Coast Guard Drawing 101 WTGB 243-003, Rev -, Stern Tube Seal Type F.S.E.

Coast Guard Drawing 101 WTGB 245-001, Rev C, Propeller and Offsets

Coast Guard Drawing 101 WTGB 245-002, Rev B, Aluminum Pattern One Single Blade

Coast Guard Drawing 101 WTGB 256-001, Rev K, Sea Water Circulating Cooling System Diagram

Coast Guard Drawing 101 WTGB 508-001, Rev E, Insulation and Lagging, Schedule, Mechanical

Coast Guard Drawing 101 WTGB 514-002, Rev X, Ventilation & A/C Arrangements & Details

Coast Guard Drawing 101 WTGB 514-005, Rev D, Heating Ventilation and Air Conditioning Diagram

Coast Guard Drawing 101 WTGB 521-001, Rev H, Firemain, System Diagram

Coast Guard Drawing 101 WTGB 521-002, Rev R, Firemain System, Arrangements and Details

Coast Guard Drawing 101 WTGB 529-001, Rev K, Bilge and Ballast, System Diagram

Coast Guard Drawing 101 WTGB 529-002, Rev P, Bilge and Ballast, Arrangements and Details

Coast Guard Drawing 101 WTGB 562-001, Rev N, Rudder

Coast Guard Drawing 101 WTGB 562-002, Rev-R, Rudder Stock Bearing Details

Page viii (Rev-0)

Coast Guard Drawing 101 WTGB 581-001, Rev T, Anchor Handling A & D

Coast Guard Drawing 101 WTGB 635-001, Rev Q, Insulation, Sheathing & Noise control

Coast Guard Drawing 101 WTGB 643-001, Rev L, Crew’s Berthing, A & D

Coast Guard Drawing 101 WTGB-801-003, Rev C, Docking Plan

Coast Guard Drawing 101 WTGB 801-004, Rev E, General Arrangement Below Deck

Coast Guard Drawing 101 WTGB 801-005, Rev H, General Arrangements, Main Deck and Above

Coast Guard Fleet Drawing FL-3306-41, Rev -, Double Berth Officer

Coast Guard Drawing FL 3801-67, Rev-, Sheets 1 through 10 of 50 (General Notes - Ductwork) and Sheet 39 (Handholes for W.T. and N.W.T. Ducts)

Coast Guard Drawing FL 6713-201, Rev B, CRP-V850 Transducer (B-

14) Adapter Assembly

PUBLICATIONS

Coast Guard Commandant Instruction (COMDTINST) M10360.3 (series), Jun 2006, Coatings and Color Manual

Coast Guard Technical Publication (TP) 3483, Section 580-A, April 2001, Manufacturer's Instruction Book-SWBS Groups 580-583, Anchor Windlass - Instructions

Coast Guard Technical Publication (TP) 3483, Section 580-B, April 2001, Manufacturer's Instruction Book-SWBS Groups 580-583, Anchor Windlass - Drawings

Coast Guard Technical Publication (TP) 3484, Section I, SWBS 593, June 1985, Oily Water Separator

Coast Guard Technical Publication 4593C, March 2004, Technical Manual for Type F.S.E. Seal

Raytheon V850 Color Echosounder, 2nd Edition, Mar 1993, Operation Manual

Page ix (Rev-0)

WYTM Lineshaft Alignment Analysis, Report No. 7715, 12/27/77

INDUSTRY STANDARDS

American Bureau of Shipping (ABS) 2, Rule Requirements for Survey After Construction, 2007, Part 7, Appendix Section 10, Guide for Bronze and Stainless Steel Propeller Castings

American Society of Mechanical Engineers (ASME) B16.34, 2004, Valves-Flanged, Threaded, and Welding End

ASTM International (ASTM) A36, 2008, Standard Specification for Carbon Structural Steel

ASTM International (ASTM) A131, 2007, Standard Specification for Structural Steel for Ships

ASTM International (ASTM) D1330, 2004, Standard Specification for Rubber Sheet Gaskets

ASTM International (ASTM) D3951, 1998, Standard Practice for Commercial Packaging

ASTM International (ASTM) E797, 2005, Standard Practice for Measuring Thickness by Manual Ultrasonic Pulse-Echo Contact Method

ASTM International (ASTM) F992, 2006, Standard Specification for Valve Label Plates

International Standard For Organization (ISO) 484/2, 1981, Shipbuilding - Ship Screw Propeller - Manufacturing Tolerances - Part 2: Propellers of Diameter Between 0.80 and 2.50 m, Inclusive

Manufacturers Standardization Society of the Valve and Fittings Industry (MSS) SP-61, 2003 Edition, Pressure Testing Of Steel Valves

Manufacturers Standardization Society of the Valve and Fittings Industry (MSS) SP-67, 2002 Edition, Butterfly Valves

Manufacturers Standardization Society of the Valve and Fittings Industry (MSS) SP-72, 1999 Edition, Ball Valves with Flanged or Butt-Welding Ends for General Service

Manufacturers' Standardization Society of the Valve and Fittings Industry (MSS) SP-80, 2003 Edition, Bronze Gate, Globe, Angle and Check Valves

Page x (Rev-0)

Consolidated List of Government-furnished Property

The following is a list of property, which the Government will furnish. This list supersedes any other material obligations indicated or implied by referenced drawings.

WORK

ITEM

MTI ITEM DESCRIPTION NSN/PN QTY ESTIMATED

COST

($/UNIT)

5 Y **Propeller

Shaft NSN: 2010-01-089-8123 1 ea. 12,750.00

6 N Shaft Seal Assembly 2010-01-540-3303 1 ea. 17,774.53

7 Y **Propeller NSN: 2010-01-078-8216 1 ea. 42,812.00 8 N ***V850 Color

Echo Sounder NSN: 5845-01-518-7245 1 ea. 1,423.41

12 Y **Rudder NSN: 2040-01-115-3498 1 ea. 32,436.00 12 Y **Rudder Stock NSN: 2040-01-115-5203 1 ea. 19,337.00 17 N *Transducer cover plate N/A 1 ea. 500.00

*Government-loaned property, which shall be returned to the vessel upon completion of the availability.

**New or refurbished equipment that the Government may provide for installation in place of existing equipment.

***Government-furnished property, which is to be supplied by either the vessel, Electronic Systems Support Unit (ESU) or local Electronic Support Detachment (ESD).

Page xi (Rev-0)

Consolidated List of Critical Inspection Items

The following is a list of work items, which contain Critical Inspection reports, which the Contractor must complete within the first 25% of the availability contract period (see Std Spec 0000_STD, paragraph 3.6.2 (Inspection report particulars)):

Work Item Title

1 Perform Ultrasonic Thickness Measurements – Hull Plating

5 Remove, Inspect and Reinstall Propeller Shaft

12 Remove, Inspect and Reinstall Rudder Assembly

12 Perform Anchor Windlass Maintenance

14 Inspect Anchor, Anchor Chain and Ground Tackle

19 Flying Bridge, Inspect and Repair

26 Renew Section of Ventilation Ducting

27 Preserve Bilge Surfaces in Motor Room

Page xii (Rev-0)

Specification Feedback

The intent of this section is to inform all users that a spec feedback mechanism is in place, and is located on the MLCA Naval Engineering Division’s website. Spec feedback is a very important part of our overall continuous improvement process, and is crucial to specification development. It will allow spec writers to capture all specification-related lessons learned, and avoid mistakes or ambiguities in follow-on availabilities.

All feedback will be reviewed, evaluated, and responded to in a timely manner.

If you have access to the CGWeb (Intranet), please use the following link, which will connect you to the MLCA(v) Naval Engineering website, for submitting your feedbacks:

http://webapps.mlca.uscg.mil/vdiv/specifications/feedback/default.cfm

If you do not have access to the CGWeb (Intranet), you may still submit your feedbacks, using the following web link:

http://www.uscg.mil/mlclant/VDiv/specs/specfeedback.htm

Page xiii (Rev-0)

Principal Characteristics

Tug

Length overall 140' 0"

Length between Perpendiculars 130' 0"

Breadth, Extreme 37' 7-1/4"

Depth, Molded 18' 2-3/8"

Frame Spacing 1' 6"

Full Load (Winter) Draft (at ) 12' 1-1/2"

Full Load (Winter) Displacement 687 Long tons (LT)

Above Base (KG) 13' 1"

Full Load Trimming Moment (Forward) 75.6 Ft-LT

Minimum Operating Condition Draft (at ) 11' 6-3/8"

Minimum Operating Condition Displacement 640 Long tons

Above Base (KG) 13' 4-1/4"

(Forward) 76.8 Ft-LT

Height of Vessel Above DWL Approx. 62' 0"

NOTE: Values above are for representative tug. Draft and longitudinal lever values provided above are for tugs in fresh water. Longitudinal lever values are provided to adjust tug's design drag of 1.0 feet by the stern.

Page 1 (Rev-0)

00000_DLA_FLT (23 Oct 2008)

General Requirements

1. SCOPE

1.1 Intent. This item describes the general requirements to be followed by the Contractor while conducting this availability.

1.2 Government-furnished property.

None.

2. APPLICABLE DOCUMENTS

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 0000_STD, 2006 Edition, General Requirements

Coast Guard Maintenance and Logistics Command Atlantic (MLCA) Standard Specification 0740_STD, 2004 Edition, Welding and Allied Processes

Coast Guard Commandant Instruction (COMDTINST) M10360.3 (series), Jun 2006, Coatings and Color Manual

3. REQUIREMENTS

3.1 General. The Contractor shall conform to all requirements specified in Std Spec 0000_STD and in this item, as applicable, during the performance of this availability.

NOTICE!

The requirements of paragraph 3.1 (General) applies to all work under the scope of this contract, whether explicitly stated in work items or not, and also to all other work subsequently authorized by changes, modifications, or extensions to the contract.

3.2 Contractor-provided fire watch personnel. The Contractor

shall provide fire watch personnel and equipment.

3.3 Welding and brazing requirements. The Contractor shall

perform all welding and allied processes, and nondestructive inspection (NDI), in accordance with Std Spec 0740_STD.

Page 2 (Rev-0)

3.4 Term substitution – COTR for COR. The Contractor shall be aware that the term “COR” (Contracting Officer’s Representative) has been discontinued in favor of “COTR” (Contracting Officer’s Technical Representative); consequently, whenever “COR” is encountered in this specification package, including referenced standard specifications and other referenced documents, it shall refer to “COTR”, explicitly.

4. NOTES

4.1 Access to COMDTINST M10360.3. The COMDTINST M10360.3 may

be accessed at the following URL address:

http://www.uscg.mil/directives/cim.asp

4.2 QA inspection forms. QA inspection forms (QA-1 thru QA-5), required in Std Spec 0000_STD to be completed and submitted during preservation of “critical-coated surfaces”, are provided at the end of this item.

Page 3 (Rev-0)

QA-1: QUALITY ASSURANCE INSPECTION FORM - PRESERVATION CHECKLIST

CHECKPOINT 1 – COATING SYSTEM COMPLIANCE

Ensure all coatings are in compliance with COMDTINST M10360.3, Appendix C.

CHECKPOINT 2 - PAINT STORAGE

Ensure all coatings are kept at a temperature of 65 to 85°F at all times, unless otherwise specified by the coating manufacturer(s).

CHECKPOINT 3 - AMBIENT CONDITIONS

Ensure surface and surrounding temperatures are each between 50 and 90°F for water-based coatings, and 35 and 95°F for other coatings, unless otherwise specified by the coating manufacturer(s).

Ensure maximum relative humidity (RH) is as follows, from surface preparations through final curing of topcoat: 50% for tanks, voids, and vent plenum; and 85% for all other areas, unless otherwise specified by manufacturer(s).

Ensure surface temperature is at least 5°F above the dew point, unless otherwise specified by the coating manufacturer(s).

CHECKPOINT 4 - PRE-SURFACE PREPARATION

Remove surface contaminants (soluble salts, loose rust, mud, and marine growth) with low pressure fresh water wash down (maximum 5,000 psi). If oil and grease are present, perform solvent cleaning, as per SSPC SP-1.

CHECKPOINT 5 - SURFACE PREPARATION

Verify environmental conditions (see CHECKPOINT 3).

Ensure cleanliness of prepared surface is as per specification (i.e.: SSPC SP-12, SP-11, SP-10…).

Verify surface anchor profile (1.5-3.5 mils for abrasive-blasted steel surfaces; 1.0 mil (minimum) for power-tool cleaned surfaces; 1.0-1.5 mils for abrasive-blasted aluminum surfaces); and 1.5 –2.5 for surfaces to be coated w/single coat of inorganic zinc).

Measure soluble salt conductivity (5 measurements per 1000 sqft) – maximum threshold: 70 microsiemens/cm for non-submerged surfaces and 30 microsiemens/cm for submerged surfaces.

CHECKPOINT 6 - PRIMER COAT APPLICATION

Verify environmental conditions (see CHECKPOINT 3).

Verify proper mixing and stand-in (induction) times.

Ensure no paint is applied when the temperature is expected to drop to freezing before the paint has dried.

Ensure surfaces are completely dry, unless otherwise allowed by the Coating Manufacturer(s).

Verify wet film thickness at random, to prevent under or over application.

Brush out all runs, sags, drips, and puddles.

Perform visual inspection for holidays and other defects.

CHECKPOINT 7 – STRIPE COAT APPLICATION

Verify environmental conditions (see CHECKPOINT 3).

Ensure overcoating window is as per manufacturer’s instructions.

After primer coat (mist coat after inorganic zinc), brush-apply un-thinned coat of same primer paint over edges, weld seams, cut-outs, and areas of complex geometries @ 3-4 mils wet film thickness (WFT).

CHECKPOINT 8 – TOP COAT APPLICATION

Verify environmental conditions (see CHECKPOINT 3).

Ensure overcoating window is as per manufacturer’s instructions.

Verify proper mixing and stand-in (induction) times, as applicable.

Verify wet film thickness at random, to prevent under or over application.

Brush out all runs, sags, drips, and puddles.

CHECKPOINT 9 – FINAL INSPECTION

Verify final system dry film thickness.

Verify system cure for service resumption - U/W Body surfaces: 5-8 hours @ 77 degrees F; Potable water tanks: 7 days @ 77 degrees F.

Ensure potable water tank exhaust ventilation is maintained continuously from and during coating application through final system cure (minimum 7 days @ 77 degrees F.), to exhaust all solvent to the atmosphere and to prevent solvent entrapment.

CHECKPOINT 10 – RECORD KEEPING

Complete, sign, and submit all provided QA Inspection Forms.

Signature of Inspector:______________________________________________________Date:____________

Page 4 (Rev-0)

QA-2. QUALITY ASSURANCE INSPECTION FORM

ENVIRONMENTAL READINGS

(Use one sheet for each activity. Record conditions every four hours from before surface preparation to application of final coating system coat)

DATE TIME

ENTER ACTIVITY

(Surface preparation, primer coat, barrier coat, top coat, etc…)

LOCATION DEW

POINT

SURFACE

TEMP.

% REL.

HUMIDITY

SIGNATURE

OF

INSPECTOR

.Signature of Inspector:__________________________________________________Date:____________

Page 5 (Rev-0)

QA-3 QUALITY ASSURANCE INSPECTION FORM

SURFACE PROFILE LOG

Vessel Name And Hull Number:__________________________________________________

Work Item Title:_______________________________________________________________

Location Of Work (Including Frame Numbers):_____________________________________

Area (Square Feet):_____________

Surface Preparation Method:_____________________________________________________

Abrasive Manufacturer And Size:_________________________________________________

Degreasing Method Used:________________________________________________________

Number Of Hours Surfaces (Steel Only) Left Unpainted:______________________________

Sweep blasting performed to remove flash rusting (steel)? Yes/No:_____________________

Place Surface Profile Replica Tapes In The Spaces Provided Below, To Serve As Permanent QA record.

Maintain separate log for each area/location. When an Area Is Divided Into Separate Sections, Maintain A Separate Log for Each Section.

AVERAGE MILS

(IAW ASTM D4417,

METHOD C)

Place Surface Profile Replica Tape Here

Reading:__________ mils

• Place Surface Profile Replica Tape Here

Date and Time:__________________________________________________

Location of Surface Profile Measurements:___________________________________________________________

Signature of Inspector:____________________________________________________________________________

Page 6 (Rev-0)

QA-4. QUALITY ASSURANCE INSPECTION FORM

SURFACE SOLUBLE SALT CONDUCTIVITY LOG

Vessel Name and Hull Number:__________________________________________________

Work Item Title:_______________________________________________________________

Location of Work (including frame numbers):_______________________________________

Area (square feet):____________

DATE TEST LOCATIONS CONDUCTIVITY

(microsiemens/cm)

Date and Time:_________________________________________

Signature of Inspector:___________________________________

Page 7 (Rev-0)

QA-5. QUALITY ASSURANCE DATA FORM

DRY FILM THICKNESS (DFT) MEASUREMENTS IAW SSPC PA-2

(Use one sheet for each sequence)

Vessel Name and Hull Number:__________________________________________________

Work Item Title:______________________________________________________________

Coating Manufacturer:_________________________________________________________

Product Name:________________________________________________________________

Batch Number:________________________________________________________________

Induction Time:_______________________________________________________________

Coating System Sequence (Indicate whether: primer, touch-up primer, barrier coat, 3rd coat…):__________________

DFT

MEASUREMENT

NUMBER

LOCATION OF READINGS MEASURED DFT

Application Method (Airless, Conventional Spray, Rolled):____________________

Average DFT: __________________________________________________________

Date and Time: _________________________________________________________

Signature of Inspector: ___________________________________

Page 8 (Rev-0)

11001_TEF_FLT (03 Dec 2008)

WORK ITEM 1: Perform Ultrasonic Thickness Measurements –Hull Plating

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to perform thickness measurements of hull plating, by ultrasonic methods.

1.2 Government-furnished property.

None.

2. APPLICABLE DOCUMENTS

ASTM International (ASTM) E797, 2005, Standard Practice for Measuring Thickness by Manual Ultrasonic Pulse-Echo Contact Method

3. REQUIREMENTS

3.1 General.

3.1.1 Critical Inspection Report. The Contractor shall submit a critical inspection report (CIR) for the inspections listed in the following paragraph(s), within 24 hours after inspection completion:

• 3.2 (Thickness measurement particulars).

3.2 Thickness measurement particulars. The Contractor shall

perform a total of 500 ultrasonic thickness measurements of various surfaces, in locations designated by the Coast Guard Inspector. Submit a CIR. Ensure that the ultrasonic apparatus, procedure requirements, and report shall be in accordance with ASTM E797, and the report results shall additionally include the following, for each test point:

• Location.

• Original metal thickness.

• Measured metal thickness.

Page 9 (Rev-0)

• Percent deterioration (calculation is based on the original metal thickness).

3.3 Apparatus Standardization. The Contractor shall perform

ultrasonic equipment standardization in accordance with ASTM E797, Section 7 (Standardization of Apparatus) and Section 8 (Technical Hazards).

4. NOTES

This section is not applicable to this work item.

Page 10 (Rev-0)

11400_PWB_140 (23 Sep 2009)

WORK ITEM 2: Inspect Bubbler Channels

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to inspect the bubbler channels.

1.2 Government-furnished property.

None.

2. APPLICABLE DOCUMENTS

Coast Guard Drawing 101 WTGB 114-002, Rev L, Bubbler Structure

Coast Guard Commandant Instruction (COMDTINST) M10360.3 (series), Coatings and Color Manual

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 0000_STD, 2006 Edition, General Requirements

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 1001_STD, 2004 Edition, Temporary Hull Accesses

3. REQUIREMENTS

3.1 General.

3.1.1 Temporary access openings. Due to limited access to work areas, the Contractor shall cut 10 shell inserts along the port & starboard hull (using existing insert plates shown on Coast Guard Drawing s101 WTGB 114-02), to facilitate complete inspection of all surfaces of the channels. Perform all work required to open and close the access openings in accordance with Std Spec 1001_STD.

3.2 Channel inspection. The Contractor shall perform visual

inspection of all bubbler channels, using Coast Guard Drawing s101 WTGB 114-02 as guidance. Submit a CFR.

Page 11 (Rev-0)

3.3 Touch-up preservation. The Contractor shall prepare and

coat all new and disturbed exterior and interior surfaces to match existing adjacent surfaces, in accordance with COMDTINST M10360.3, Appendix A (Cutter and Boat Exterior Painting Systems) and Appendix B (Cutter and Boat Interior Painting Systems), respectively, and as applicable. Abide by all touch-up requirements outlined in paragraph 3.11.9 (Touch-ups and minor coating repairs) of Std Spec 0000_STD.

Page 12 (Rev-0)

11401_PWB_140 (23 Sep 2009)

WORK ITEM 3: Preserve Bubbler Channels

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to preserve the bubbler channels.

1.2 Government-furnished property.

None.

2. APPLICABLE DOCUMENTS

Coast Guard Drawing 101 WTGB 114-002, Rev L, Bubbler Structure

Coast Guard Commandant Instruction (COMDTINST) M10360.3 (series), Coatings and Color Manual

3. REQUIREMENTS

3.1 Preservation particulars. The Contractor shall prepare and coat all interior bubbler channel surfaces, shown on Coast Guard Drawing 101 WTGB 114-02, including both sides of all channel access insert plates, with the system specified for “Underwater Body (U/W Body and Boot-Top, Icebreaker <235’ in Salt Water), in COMDTINST M10360.3, Appendix A (Cutter and Boat Exterior Painting Systems.

NOTE

Page 13 (Rev-0)

12300_DLA_FLT (15 Oct 2008) 140 WTGB (15 Oct 2008)

WORK ITEM 4: Inspect and Perform Structural Repairs In Chain Locker

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to clean, inspect and perform structural repairs in the Chain Locker.

1.2 Government-furnished property.

None.

2. APPLICABLE DOCUMENTS

Coast Guard Drawing 101 WTGB 801-004, Rev E, General Arrangement Below Deck

3. REQUIREMENTS

3.1 General.

3.1.1 Interferences. The Contractor shall be aware that

interferences in way of work include, but are not limited to:

• Bilge alarm.

• Anchors and chains.

• Sheathing & Insulation in Void 4-6-0-V.

3.1.2 Arrangement. Refer to Coast Guard Drawing 101 WTGB 801- 004 for guidance.

3.1.3 Operational test - initial. Prior to commencement of

work, the Contractor shall witness an operational pre-test (by Coast Guard personnel) of the bilge sensor(s)/alarm(s) to demonstrate existing operational condition. Submit a CFR.

3.2 Cleaning and inspection tasks. The Contractor shall

accomplish the following tasks:

Page 14 (Rev-0)

3.2.1 Cleaning. Clean all Chain Locker interior surfaces free of all foreign materials, such as sediment or sludge. Remove all persistent residues, taking care not to damage the coating system. Remove cleaning media and residues continuously during the washing process. Remove any residual wash media and wipe up residual moisture with clean lint-free cloths. Collect, contain, and dispose of all wash media, residues, and cleaning materials in accordance with all Federal, state, and local regulations.

3.2.2 Inspection. Visually inspect chain locker surfaces, including associated structural members. Submit a CFR including the following, as applicable:

• Structural condition.

• Inaccessible areas.

• Condition of coating system, including measurements taken, percentage, location, and type of coating failure.

3.3 Crop corroded plating. Crop and dispose of approximately

12 square feet of corroded steel plating shown on Coast Guard Drawing 101 WTGB 801-004 as designated by the Coast Guard inspector.

3.4 Plate renewals. Furnish and install new steel plating

vacated by plate removals shown on Coast Guard Drawing 101 WTGB 801-004 in accordance with Std Spec 0740_STD.

3.5 Surface preparation and coating. The Contractor shall

prepare and coat all new and disturbed exterior and interior surfaces to match existing adjacent surfaces, in accordance with COMDTINST M10360.3, Appendix A (Cutters and Boats Exterior Painting Systems) and Appendix B (Cutter and Boat Interior Painting Systems), respectively, and as applicable, to match existing adjacent surfaces. Abide by all touch-up requirements outlined in paragraph 3.11.9 (Touch-ups and minor coating repairs)) of Std Spec 0000_STD.

3.6 In-process quality control measures. The Contractor shall abide by all the safety, preservation, and quality control requirements specified in Std Spec 0000_STD, paragraph titled “General preservation requirements.

3.7 Boundary tests. The Contractor shall verify the integrity of all boundaries affected by this work item using one of the methods described in Std Spec 0740_STD, Appendix C. Submit a

CFR.

Page 15 (Rev-0)

3.8 Operational test – final. In the presence of the Coast

Guard Inspector, the Contractor shall thoroughly test and prove the bilge sensor(s)/alarm(s) to be in satisfactory operating condition. Submit a CFR.

Page 16 (Rev-0)

24310_MWS_FLT (14 Jan 2009) 140 WTGB (30 Jul 2008)

WORK ITEM 5: Remove, Inspect, and Reinstall Propeller Shaft

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to remove, inspect, and reinstall the propeller shaft.

1.2 Government-furnished property.

MTI ITEM DESCRIPT NSN/PN QTY ESTIMATED C

($/UNIT)

Y **Propeller Shaft NSN: 2010-01-089-8123 1 ea.

12,750.00

2. APPLICABLE DOCUMENTS

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 0740_STD, 2004 Edition, Welding and Allied Processes

Coast Guard Drawing 101 WTGB 243-001, Rev T, Shafting and Bearing Arrangement and Details

Coast Guard Drawing 101 WTGB 243-002, Rev -, Propulsion Shafting Arrangement

Coast Guard Drawing 101 WTGB 243-003, Rev -, Stern Tube Seal Type F.S.E.

WYTM Lineshaft Alignment Analysis, Report No. 7715, 12/27/77

ASTM International (ASTM) D3951, 1998, Standard Practice for Commercial Packaging

3. REQUIREMENTS

3.1 General.

Page 17 (Rev-0)

3.1.1 Critical Inspection Report. The Contractor shall submit a critical inspection report (CIR) for the inspections listed in the following paragraph(s):

• 3.2.2 (Inspections).

3.1.2 Interferences. The Contractor shall be aware that

interferences in way of work include, but are not limited to the following:

• Deck plates.

• Cat walk over the shaft.

• Fairwater.

• Stern tube seal system.

3.2 Work to be accomplished. Using Coast Guard Drawing 101 WTGB 243-001, Coast Guard Drawing 101 WTGB 243-002 and Coast Guard Drwing 243-003 as guidance, as applicable, the Contractor shall accomplish the following for the propeller shaft:

3.2.1 Removals.

• Mark existing shaft position, and match-mark shaft coupling bolts to their respective holes, to facilitate reinstallation procedures.

• Remove the shaft and attached components to a suitable repair facility. Ensure shaft is properly protected and supported at all bearing journals, at all times, until reinstallation.

3.2.2 Inspections. Clean the shaft free of all marine growth, and accomplish the following inspections, as applicable (Submit CIR):

3.2.2.1 Visual. Visually inspect the following components, as applicable, for excessive wear and other mechanical defects such as nicks, cracks, and corrosion:

• Shaft surfaces.

• Bearing surfaces.

• All shaft and propeller associated fasteners.

• Stern tube surfaces.

• Couplings.

• Stern tube/shaft sealing systems.

Page 18 (Rev-0)

• Packing ring and glands.

NOTICE!

Before taking shaft runout readings, spin the shaft slowly on a lathe for approximately two hours at to eliminate any sagging that may have occurred during handling and storage.

3.2.2.2 Measurements.

• Measure keys and keyways.

• Measure all bearing sleeve or journal diameters.

• Measure runouts for shaft taper, shaft straightness, and coupling end diameters.

• With the key in-place, fit the shaft coupling to the shaft in shop and check the contact percentage by bluing.

If the contact is less than 80%, the Contractor shall grind and hand stone the coupling hub to achieve a minimum of 80 percent contact, and verify by bluing again. Make a small inscription on the shaft to mark the coupling hub location and use it as a reference in final assembly. Measure and record the coupling face and bore runouts.

3.2.2.3 Nondestructive inspection. Perform nondestructive

inspection of all bearing sleeves, shaft tapers, coupling bolts, keyways, and welded repair surfaces, in accordance with Std Spec 0740_STD, Appendix C.

3.2.2.4 Fiberglass covering. Inspect the shaft fiberglass

covering for porosity as follows:

3.2.2.4.1 Visually inspect the plastic covering for evidence of lack of adhesion, and other defects.

3.2.2.4.2 Conduct a high voltage spark test of the covering at 250 to 300 volts per mil of glass reinforcement (approximately 15,000 volts for a four-ply covering). Pay particular attention to the joining line between sleeves, couplings, and shafts.

3.2.3 Reinstallation. Reinstall the propeller shaft to its original configuration and accomplish the following, using Coast Guard Drawing 101 WTGB 243-001, as applicable. Machine, grind, or hand-stone couplings, if necessary, to achieve an 80 percent contact.

Page 19 (Rev-0)

3.3 Government-furnished shaft. The Contractor shall be aware that the Government reserves the right to furnish a spare propeller shaft to be installed in lieu of the one removed. After a Change Request has been released and authorized by the KO, the Contractor shall transport the spare shaft to a suitable inspection facility, perform the inspections specified in paragraph 3.2.2 (Inspections), and submit a CFR.

3.4 Alignment between coupling flanges. The Contractor shall

check the motor/propeller shaft alignment when the vessel is waterborne, using WYTM Lineshaft Alignment Analysis, Report No.

7715 as guidance. Submit CFR.

NOTICE!

Alignment measurements shall be conducted prior to sunrise. If alignment is out of tolerance, physical symptoms such as excessive shipboard vibrations and/or abnormal noise must be present in order to support the measurements. Otherwise, no adjustments are necessary.

3.4.1 Parallel or bore alignment. Position the coupling

flanges within 0.5" of each other and place a straight edge at the following points, Top/Bottom, and Outboard/Inboard. The bore or parallel misalignment shall not be greater than 0.005 inches.

3.4.2 Angular or face alignment. Bring the coupling flanges

forward to within 0.5" face gap at all points about the diameter of the flanges. Take measurements of face gap at four equally spaced positions on the flange diameters using feeler gauge.

Compare diametrically opposite face gap readings top to bottom, and inboard to outboard. Subtract the smaller of diametrically opposite readings from the larger. The resulting difference is proportional to the amount of angular or face misalignment.

These readings shall not exceed 0.0005 inches per inch of companion flange outside diameter.

3.5 Post-installation operational testing. In the presence of the Coast Guard Inspector, the Contractor shall thoroughly test and prove the shafting system to be in satisfactory operating condition (see 4.1 (Equipment operation)). Conduct a sea trial to test the propeller shaft in all modes of operation for a minimum of 4 hours. Inspect and correct any excessive leakage, abnormal noise and excessive vibration.

Page 20 (Rev-0)

4.1 Equipment operation. Coast Guard personnel will operate

all shipboard machinery and equipment during all operational tests. 4.2 A temporary support of 600 lbs +/-30 lbs is required at Frame 73, approximately 7 inches from the shaft coupling flange in accordance with the WYTM Motor Alignment Report (Figure 5).

4.3 From paragraph 3.3 of the WYTM Motor Alignment Report:

Case Optimum 1 2

Gap 0.007 @ bottom

0.003 @ bottom

0.010 @ bottom

Offset 0.003 @ motor high

0.019 @ motor high

0.010 motor low

Bearing loads / Fore motor

8681 7683 9678

After motor 8722 11042 6402

Fore end stern

6641 2965 10316

After end stern

6699 (18.1 psi)

9051 (24.5 psi)

Page 21 (Rev-0)

24335_MWS_140 (01 Sept 2009)

WORK ITEM 6: Overhaul Shaft Seal Assembly

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to overhaul the shaft seal assembly.

1.2 Government-furnished property.

MTI ITEM DESCRIPTION NSN/PN QTY

ESTIMATED

COST

($/UNIT)

N Shaft Seal Assembly 2010-01-540-3303 1 ea. 17,774.53

2. APPLICABLE DOCUMENTS

Coast Guard Drawing 101 WTGB 243-002, Rev -, Propulsion Shafting Arrangement

Coast Guard Drawing 101 WTGB 243-003, Rev -, Stern Tube Seal

(TYPE FSE)

Coast Guard Technical Publication 4593C, March 2004, Technical Manual for Type F.S.E. Seal

3. REQUIREMENTS

3.1 General.

3.1.1 Technical Representative. The Contractor shall provide

the services of a Technical Representative (Tech Rep), who is familiar with the John Crane F.S.E. seal system, and authorized by the manufacturer, to accomplish the following tasks – on site:

• Assist with proper overhaul and reinstallation methods.

• Ensure compliance with manufacturer's procedures and standards during overhaul.

Page 22 (Rev-0)

3.1.1.1 The Contractor shall ensure that the Tech Rep possess a résumé of demonstrated experience with the system described above.

3.1.1.2 The Contractor shall submit a copy of the Tech Rep’s

résumé and a list of references to the COTR at the Arrival Conference.

3.1.2 Interferences. The Contractor shall be aware that

interferences in way of work include, but are not limited to the following:

• Propeller shaft.

• Propeller shaft coupling.

• Propeller shaft guard.

• Coupling shaft guard.

3.2 Seal overhaul particulars. The Contractor shall accomplish the following tasks, using Coast Guard Drawings 101 WTGB 243- 002, 101 WTGB 243-003, and TP-4593C as guidance:

3.2.1 Removal. Disassemble and remove the existing shaft seal from the propeller shaft.

3.2.2 Inspections. Accomplish the following inspections, and

submit a CFR for each inspection:

3.2.2.1 Shaft sleeves. After removal of all the seal

components, visually inspect the shaft sleeve surfaces and all the removed seal components for wear, defects and deterioration.

Submit a CFR.

3.2.2.2 Replacement shaft seal kit. Under the supervision of

the technical representative, visually inspect the new seal components for any defects. Submit a CFR.

3.2.3 Seal component renewal. Refurbish the shaft seal with

new seal components, under the supervision of the Tech Rep.

3.3 Operational test – final. In the presence of the Coast

Guard Inspector and under the supervision of the Tech Rep, the Contractor shall thoroughly test and prove the F.S.E. shaft seal, including emergency seal, to be in satisfactory operating condition (see 4.1 (Equipment operation)). Submit a CFR.

Page 23 (Rev-0)

3.4 Sea trials. The Contractor shall demonstrate proper

operation of the shaft seal assembly. Inspect and correct any water leaks, abnormal noise, and any binding caused by shaft seal in normal shaft operation. Submit a CFR.

4. NOTES

4.1 Equipment operation. Coast Guard personnel will operate

all shipboard machinery and equipment during all operational tests.

Page 24 (Rev-0)

24500_MWS_FLT (18 Sep 2008) 140 WTGB (07 Mar 2006)

WORK ITEM 7: Remove, Inspect, and Reinstall Propeller

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to remove, inspect, and reinstall the propeller.

1.2 Government-furnished property.

MTI ITEM

DESCRIPTION

NSN/PN QTY ESTIMATED

COST

($/UNIT)

Y **Propeller NSN: 2010-01-078-8216 1 ea. 42,812.00

2. APPLICABLE DOCUMENTS

MIL-PRF-16173, 2006, Corrosive Preventive Compound, Solvent Cutback, Cold Application

Coast Guard Drawing 101 WTGB 245-001, Rev C, Propeller and Offsets

Coast Guard Drawing 101 WTGB 245-002, Rev B, Aluminum Pattern One Single Blade

International Standard For Organization (ISO) 484/2, 1981, Shipbuilding - Ship Screw Propeller - Manufacturing Tolerances - Part 2: Propellers of Diameter Between 0.80 and 2.50 m, Inclusive

3. REQUIREMENTS

3.1 Protective and safety measures. The Contractor shall

accomplish the following:

• Before removing the propeller or propeller nut, fit a shore from the floor of the dock to one propeller blade near the root, to prevent shock transmission to main motor, as necessary.

Page 25 (Rev-0)

• Protect propeller blade edges and blade roots with suitable covers, at all times until reinstallation, to prevent damage.

3.2 Work to be accomplished. The Contractor shall accomplish

the following for the propeller, using Coast Guard Drawings 101 WTGB 245-001 and 101 WTGB 245-002 as guidance.

3.2.1 Removal. Remove the propeller to a suitable repair shop.

NOTICE!

If it becomes necessary to apply heat to facilitate propeller removal, ensure that the hub temperature never exceeds 500 degrees Fahrenheit; in addition, ensure that gland, packing ring, fill and vent plugs are removed, and the adjacent shafting and canvas under the blade edge guards are protected from flame impingement.

3.2.2 Inspection. Visually inspect the propeller in the

presence of a Coast Guard inspector for any damage, cracks, and other defects. Examine and record the suction and pressure face thickness, blade tip profiles, leading and trailing edges, contours, track, width, diameter, taper, pitch, and keyway of the propeller in accordance with ISO 484/2, Class I. Submit a written CFR.

3.2.3 Polishing. Polish the propeller to a uniform 63 micro-

inch RMS finish.

3.2.4 Propeller hub fitting check. In the presence of the

Coast Guard Inspector and with the key in place, carefully check the fit of the propeller hub bore to the shaft taper by applying Prussian blue to the shaft taper.

3.2.4.1 Uniform fit. Obtain a uniform fit of 60 percent

contact over the taper, with a slightly heavier fit on the larger end. Do not heat the shaft taper to compensate for a poor fit.

3.2.4.2 Propeller fit. If the fit is less than 60 percent, hand grind/stone the propeller hub bore to achieve the required fit.

WARNING!

Do not machine the shaft taper.

Page 26 (Rev-0)

3.2.4.3 Location inscription. When 60 percent fit has been

obtained, make a small inscription on the shaft to mark the propeller location. Use this mark as a reference in final assembly.

3.3 Propeller Installation.

3.3.1 Cleaning. For the final assembly, the propeller bore and shaft taper surfaces shall be clean and free of bluing, lubricants, dirt, foreign particles, or any other substance, which would hinder moving the propeller along the taper.

Install the propeller with dry metal-to-metal contact to obtain the maximum frictional force for torque transmission. Renew the Nitrile O-rings and packing before reassembly, if applicable.

3.3.2 Assembly. With the propeller installed on the taper in

the same position as when fitted, install the propeller nut and drive up the propeller until it is advanced forward about 1/16" beyond the inscribed mark as specified in 3.2.4.3 (Location inscription). Lock the nut in place with an appropriate locking device.

NOTICE!

It is prohibited to use grease, oil, or other substances on the taper to help drive the propeller.

3.3.3 Void filling. When applicable, the Contractor shall fill all internal voids in the propeller hub and cap with rust preventive compound conforming to MIL-PRF-16173. Renew all brass plugs.

3.3.4 Adhere to the following warnings:

• Do not heat the propeller hub, to compensate for a poor fit on the shaft taper.

• Do not machine the shaft taper to achieve the required fit.

3.3.4.1 Lock propeller nut in place with new stainless steel

lock washer or monel cap screws.

Page 27 (Rev-0)

3.4 Propeller change-out. The Contractor shall be aware that

the Government reserves the right to furnish a propeller to be installed in-place of the one removed. When the Government exercises this right, the Contractor shall turn over the removed propeller to the Coast Guard PA as a MTI item. If a Change Request has been authorized and released by the KO, the Contractor shall inspect the Government-furnished propeller, and submit a CFR including any additional work that may be required to install the new propeller to the existing shaft.

4. NOTES

4.1 Propeller details. 102" diameter x 72.947" pitch at 0.7R, 4 blades, NiAl bronze alloy, ABS Type 4.

Page 28 (Rev-0)

42410O_FLT (05 Sept 2008) 140 WTGB (25 Jun 2007)

WORK ITEM 8: Renew Depth Indicating Transducer

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to renew the transducer.

MTI ITEM

DESCRIPTION

NSN/PN QTY ESTIMATED

COST

($/UNIT)

N ***V850 Color Echo Sounder

NSN: 5845-01-

518-7245 1 ea. 1,423.41

2. APPLICABLE DOCUMENTS

Coast Guard Maintenance and Logistics Command Atlantic (MLCA) Standard Specification 0740_STD, 2004 Edition, Welding and Allied Processes

Coast Guard Drawing FL 6713-201, Rev B, CRP-V850 Transducer (B-

14) Adapter Assembly

Raytheon V850 Color Echosounder, 2nd Edition, Mar 1993, Operation Manual

3. REQUIREMENTS

3.1 General.

3.1.1 Protective measures. The Contractor shall accomplish the following tasks:

3.1.1.1 Protect all exposed ends of transmission lines, control lines, connectors, and cables from weather, moisture, and physical damage while they are disconnected from the transducer.

3.1.1.2 Take all necessary measures to protect transducer from

Page 29 (Rev-0) damage during the performance of work specified herein. Inform the COTR, in writing, of all damage, if any, that is incurred by the transducer.

3.2 Transducer renewal particulars. The Contractor shall

accomplish the following tasks, using the V850 Color Echosounder Technical Manual and Coast Guard Drawing FL-6713-201 as guidance:

3.2.1 Transducer removal. Dispose of the removed transducer

and ring adaptor assembly.

NOTICE!

Do not discard the hull ring adaptor(s).

3.2.2 New transducer installation. Install new Government-

furnished transducer, in place of the removed. Furnish and install new gaskets for all transducers as applicable.

3.2.2.1 Label plate. Following completion of transducer

installation, the contractor shall fabricate a 3/4” x 3” x 1/4” aluminum label plate, engraved with 1/4-inch high numbers stating the installation date. Affix a label plate, using a suitable epoxy cement. Ensure that the label plate is visible and legible, without the need to move equipment or cables.

3.2.2.2 Cleaning of radiating surfaces. Thoroughly clean the

transducer radiating surfaces with a strong solution of household detergent to remove any oil, dirt, and all other surface contaminants.

3.3 Transducer seal. The Contractor shall inspect the

transducer to ensure the outer circumference of the transducer is installed flush to the hull ring, and the transducer cover plate forms a tight seal with the hull ring.

3.4 Post installation tests. After completion of work, the

Contractor shall accomplish the following tasks, in the presence of the Coast Guard Inspector:

3.4.1 Water hose test. Perform a water hose test of all

affected boundaries in accordance with Std Spec 0740_STD, Appendix C.

3.4.2 Leak repairs. Observe each transducer for leaks during

the vessel re-floating process. Repair all leaks detected.

Page 30 (Rev-0)

3.4.3 Operational test. Thoroughly test and prove the new

transducer to be in satisfactory operating condition (see 4.1 (Equipment operation)). Submit a CFR.

4. NOTES

4.1 Equipment operation. Coast Guard personnel will operate

Page 31 (Rev-0)

51000_JMS_FLT (02 Oct 2008) 140WTG (25 Mar 2008)

WORK ITEM 9: Clean Shipboard Ventilation Systems

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to clean the designated shipboard ventilation systems.

1.2 Government-furnished property.

None.

2. APPLICABLE DOCUMENTS

Coast Guard Maintenance and Logistics Command Atlantic (MLCA), Standard Specification 5100_STD, 2004 Edition, Clean Shipboard Ventilation Systems

Coast Guard Drawing 101 WTGB 514-002, Rev X, Ventilation & A/C Arrangements & Details

Coast Guard Technical Publication (TP) 3456, 2001, Ship Information Book, Section B

Coast Guard Drawing FL 3801-67, Rev-, Sheets 1 through 10 of 50 (General Notes - Ductwork) and Sheet 39 (Handholes for W.T. and N.W.T. Ducts)

3. REQUIREMENTS

3.1 General.

3.1.1 Interferences. The Contractor shall be aware that

interferences in way of work include, but are not limited to the following:

• Ducting screens.

• Electric pre-heaters.

• Overhead sheathing/panels.

Page 32 (Rev-0)

• Ventilation covers.

3.1.2 Operational test - initial. Prior to commencement of

work, the Contractor shall witness an operational pre-test (by Coast Guard personnel) of the ventilation systems included in this work item, to demonstrate existing operational condition.

Submit a CFR.

3.2 Cleaning requirements. The Contractor shall clean the

following ventilation systems, shown on Coast Guard Drawing 101 WTGB 514-002, FL 3801-67 and TP 3456, in…