HB_FY16_Dry_Dock_Spec_(09-21-15).pdf

NOAA SHIP HENRY B. BIGELOW (R225)

FY2016

DRYDOCKING AND REPAIRS

DETAIL SPECIFICATION

March 2015 (Revised 09/21/2015)

NOAA - Port Office Northeast Marine Support Facility

166 Water Street Woods Hole, MA 02543

Marine Engineering Division - MOA2

Marine Operation Center, Atlantic 439 West York Street

Norfolk, VA 23510

NOAA Ship HENRY B. BIGELOW FY16 Drydocking and Repairs

March 2015 (Revised 09/21/15)

Table of Contents

1. Scope 4

2. General Requirements 4

3. Basic Items

3.1 301: Temporary Services 7

3.2 302: Drydocking and Routine Drydock Work 10

3.3 303: Sea Valve Overhauls 14

3.4 304: Zinc Renewals 17

3.5 305: Cathodic Protection System Inspection and Replacement 18

3.6 306: Underwater Body Coating 23

3.7 307: Bow Thruster Inspection 26

3.8 308: Ground Tackle Inspection and Preservation 28

3.9 309: Rudder / Tail Shaft Removal and Inspection 30

3.10 310: Propulsion Shaft Thrust Bearing Inspection & Cooler Replacement 36

3.11 311: Forepeak Ballast Tank Sandblast and Preservation 38

3.12 312: Crane Bolt Inspection and Replacement 39

3.13 313: Pump Disassembly, Inspection and Rebuild 40

3.14 314: Load Test 42

3.15 315: ABS Special Survey 43

3.16 316: Engine Exhaust Resilient Mount Replacement 45

3.17 317: Dock Trials 48

3.18 318: Sea Trials 50

3.19 319: Steering Gear Actuator Overhaul 51

3.20 320: Acoustic Doppler Current Profiler (ADCP) Repair 53

4. Additional Work Items

4.1 401: Additional Work [Labor and Materials] 58

5. Option Items

5.1 501: Anchor Windlass Replacement 59

5.2 502: Deck Covering Installation 61

5.3 503: MSD System Media Replacement & Tank Preservation 65

5.4 504: TLI Installation 68

5.5 505: Sperry Speed Log Replacement 71

5.6 506: Engine Exhaust Pipe Insulation Replacement 73

5.7 507: Superstructure Preservation 74

5.8 508: Stack Preservation 75

Appendix A: Standard Specifications, References, and Drawings 77 Appendix B: Government Furnished Equipment 80 Appendix C: Attachments 81

1. Scope - These detailed specifications contain requirements for NOAA Ship Henry B.

Bigelow (R225) FY16 Drydocking and Repairs.

2. General Requirements

2.1 References

2.1.1 NOAA Standard Specification AMC-000-1F, “General Requirements for Contract

Repair Work on NOAA Ships”

2.1.2 NOAA Standard Specification MOC-631-2D, “Coating Systems for Steel Surfaces”

2.1.3 Drawing HB-085 FA02, “General Arrangements”

2.1.4 Drawing HB-631 FF04, “Painting Schedule”

2.1.5 NAVSEA Standard Item 009-32, “Cleaning and Painting Requirements; accomplish”

2.2 Requirements

2.2.1 References 2.1.1 through 2.1.3 form a part of these Detail Specifications. All provisions and requirements contained therein are applicable to all work items, including all additional work items, which are authorized by the Contracting Officer.

All work procedures and all materials shall meet the ABS Rules.

2.2.2 Unless otherwise stated in these work items, prepare and coat all new steel, disturbed steel, or otherwise required painted surfaces in accordance with References 2.1.2 and

2.1.4. If no paint system is identified in the item, then apply the appropriate coating system similar to the area being coated as identified in Paragraph 5.2 of Reference

2.1.2 except that the top coat shall match the surrounding area. Reference 2.1.2 may be amended with reference 2.1.5 when approved by the COR.

2.2.3 Provide two hard copies and an electronic copy of all Condition Reports in Adobe

Portable Document Format (.pdf).

2.2.4 Maintain a Quality Assurance (QA) TEST AND INSPECTION PLAN applicable to all work items, including all additional work items which are authorized by the Contracting Officer. Update QA TEST AND INSPECTION PLAN weekly and provide a copy to the COR 24-hours prior to the scheduled weekly progress meeting.

Include the following minimum information for each work item and additional work item:

a. Specification item and paragraph number

b. Component/Equipment name

c. Test or Inspection description

d. Acceptance Criteria

e. Quality Assurance Inspection Report

2.2.5 Maintain a separate Test Schedule. Update Test Schedule weekly and provide a copy to the COR 24-hours prior to the scheduled weekly progress meetings.

2.2.6 Develop, in consultation with the American Bureau of Shipping (ABS) Surveyor, a written survey schedule that lists the items to be inspected and the scheduled dates and times of the inspections. Submit the survey schedule to the COR within 48 hours after the start of the contract performance period. The survey schedule shall list all initial inspections required by the ABS Surveyor. In addition, the Contractor shall schedule the services of an ABS Surveyor as required by ABS for performing inspections of all new installations, hull modifications, tank inspections, gauging inspections, and load tests. The Contractor shall be responsible for paying all ABS surveys and inspections.

2.2.7 Provide a copy of ABS approved welding procedures and maintain a list of currently ABS qualified welders.

2.2.8 Weigh all materials and items removed, installed, or relocated on the ship. Provide a summary report to the COR indicating the total weight in pounds of the materials and items with a breakdown of their locations by space, deck, frame, distance from centerline, and height off of the deck. A sample Weight Report form is attached to these specifications.

2.2.9 Update Reference 2.1.3 to “as-built” drawing for modifications accomplished by these detail specifications.

2.2.10 Update all other referenced drawings in individual work items using AutoCAD or

AutoCAD LT programs for modifications accomplished by work items.

2.2.11 The Contractor may reduce ship’s draft by offloading liquid loads and/or ballasting in order to provide the required clearances under the keel during transit to and from the Contractor’s Facility. Oil tanks shall not be ballasted. After all other work is completed, reload and trim the ship to the as-found conditions. In the event fuel is off-loaded, the fuel shall be metered off and on through a filter de-watering system.

Store removed fuel in clean storage facilities. The minimum draft which will be permitted is 19.5 feet.

2.2.12 Electrical power distribution systems available aboard the ship for Contractor power tools include 480vac via three submersible pump receptacles and 120vac receptacles throughout the ship.

2.2.13 Several work items may affect habitability on the ship. Schedule work on these items at the same time and minimize that work to a two week period to the maximum extent possible in order to minimize the impact on Ship’s Force. Provide the COR with three days advance notice prior to starting work that affects ship’s habitability in order for the Government to make other arrangements for lodging and meals for the crew off the ship.

2.2.14 The Contractor shall minimize shipboard work and inspections requiring ship’s force and COR presence on November 26, December 24 and 25, 2015 and January 1 2016.

Shipboard work may include mechanical tools and light industrial work. The Contractor shall not schedule nor conduct any shipboard hot work during these periods.

2.2.15 Vehicle and personnel access to NOAA Ship Henry B. Bigleow for pre-bid inspections is restricted via gated security. All contractors, vendors, and visitors are required to make pre-arrival arrangements for access at a minimum of 14 days in advance by calling the Port Engineer at 508-495-4708 (office) or 508-642-3986 (cell).

2.3 Notes

2.3.1 Descriptive data of NOAA Ship Henry B. Bigelow is as follows:

Length Overall 208.6 feet Beam (Molded) 49.2 feet Displacement 1,840 metric tons Light Ship

2,479 metric tons Full Load Draft 20.35 feet Full Load Centerboard Retracted

29.7 feet Full Load Centerboard Extended Cruising Speed 12 knots [Max speed 14 knots] Propulsion Diesel Electric, Single Propeller, Fixed Pitch, with two in-line 1508 hp DC Motors Generators Caterpillar 3508B, 3512B (two each) 600 volts AC Bow Thruster Elliott 40T3S, 360 Degree Electric Service 480 volts AC Year Built Commissioned July 2006 Builder VT Halter Marine Inc, Moss Point, MS

ABS ID 06142681

IMO Number 9349057 Construction Welded Steel Hull, Aluminum Superstructure Crew size 22 Bunks 39 Homeport of Record Woods Hole, MA Drydock and Repair Contractors Facility

2.3.2 Reference 2.1.3 was used in the identification, location, and naming of spaces within these Detailed Specifications. As the government cannot guarantee the accuracy of this drawing, contractors are encouraged to verify information identified in Reference

2.1.3 prior to starting any work or submitting a bid.

2.3.3 A copy of referenced drawings and technical manuals may be reviewed on board the ship during pre-bid inspection or in the Northeast Fisheries Science Center, 166 Water Street, Woods Hole, MA 02543 upon request.

2.4 Hazardous Materials

2.4.1 NOAA Ship Henry B. Bigelow was constructed between 2004 and 2006. There was no asbestos used during construction. Asbestos requirements contained in referenced Standard Specifications do not apply to this ship.

2.4.2 Several items in this specification require gas freeing of tanks in order to accomplish the required work. Prospective bidders should be careful not to duplicate costs of gas freeing where tank(s) are required to be gas freed to perform work in more than one item.

2.4.3 The Contractor is responsible for the control, handling, and disposal of any hazardous materials generated during accomplishment of this contract.

2.5 Metrication

2.5.1 A combination of Standard English units of measure (feet – pounds) and Metric

System International (SI) units of measure (millimeter - kilogram) were used in the builders' drawings, specifications and reference materials for construction, operation, maintenance and repair of this ship. In this specification for NOAA Ship Henry B.

Bigelow, there is a combination of Standard English units and metric units.

3. BASIC ITEMS

3.1 Item 301: Temporary Services

3.1.1 Work Description - Includes labor, material, and equipment for Temporary Services at the Contractor’s Facility.

3.1.2 References

(a) NOAA Standard Specification AMC-000-2C, “Temporary Services at

Contractor Facilities”

3.1.3 Government Furnished Material

3.1.3.1 None

3.1.4 Requirements

3.1.4.1 Provide temporary services required in accordance with Reference (a) with shore connection details and additional requirements as follows for the entire performance period:

3.1.4.1.1 Electrical Shore Power --- Two circuits rated for 480 VAC, 3-Phase, 60-Cycle, 400-

Amp continuous service each [800 amps total]. The Contractor has the option to connect directly to ship’s NATO-standard plug (MIL-C-24368) receptacles located on the 01-Deck aft connection box, or to use ship’s shore power cables with NATO-standard plugs. If ship’s cables and plugs are used, provide protection to prevent damage to ship’s plugs and cables.

3.1.4.1.2 Potable Water --- One 1-1/2 inch hose providing a minimum of 100 gallons per minute in a range of 40 to 60 psi.

3.1.4.1.3 Telephone Service --- Six private telephone lines distributed as follows:

(1) Two lines to ship’s telephone shore tie (2 voice)

(2) Two lines to ship’s dockside office spaces (2 voice)

(3) One line to COR’s dockside office space (1 voice)

Telephone service shall include local calls, toll free calls, and calling card calls only.

Long distance calls shall either be blocked or itemized and billed directly to the ship for payment.

3.1.4.1.4 High-Speed, Broadband Internet Connectivity --- Internet connections via local

Internet Service Provider (ISP). High-speed, broadband internet is defined as Digital Subscriber Service (DSL) or cable internet service with typical minimum download speeds of 320 Kbps. The service shall be a business-type account that supports VPN connections, if available, and shall include necessary DSL or cable modem provided by the ISP. Provide two high speed connections, one to the ship and one to dockside offices. Make ship’s connection available while the ship is dockside and while the ship is in the dry dock.

3.1.4.1.5 Sanitary and Cooling Water --- One 2-1/2 inch hose providing a minimum of 150 gallons per minute in a range of 45 to 60 psi.

3.1.4.1.6 Sewage Disposal --- One 3-inch cam lock quick-disconnect fitting and hose.

3.1.4.1.7 Garbage --- One dumpster on the fantail.

3.1.4.1.8 Vehicle Parking Spaces --- A minimum of six spaces inside the gate, near the dockside office spaces or the ship, plus a minimum of six more spaces outside the gate.

3.1.4.1.9 Dockside Office Spaces --- Three dockside office spaces total, comprised of two spaces for ship’s dockside office, and one space for the COR. Provide three sets of keys to each space to the COR.

3.1.4.1.10 Security --- Security services to make rounds of the ship hourly [this is an increase from every two hours required in reference (a)] on weekdays from 1600 – 0800, on weekends from 1600 Friday to 0800 Monday, and on federal holidays.

3.1.4.1.11 Engine Room Bilge Cleaning --- In addition to disposing of oily water in engine room bilges in reference (a), pump out and dispose of an estimated 500 gallons of waste oil from waste oil tank 4-47-1 and an estimated 750 gallons of oily water from oily waste tank 4-47-2. Access these tanks through manhole covers in Engineers Workshop 3-39-01 and Auxiliary Machinery Room 3-39-01. After pumping out these tanks, close access covers with new gaskets.

3.1.4.1.12 Crane Service --- Provide crane services and rigging services on an as-needed basis for an estimated total of ten hours for loading or offloading ship’s equipment and loading ship’s stores. Crane loads are estimated not to exceed to 5,000 pounds.

Provide the COR with a procedure to request crane services with nominal four hours advance notice. If additional crane service is needed beyond estimated ten hours, then the COR will provide an additional item request to the Contracting Officer for negotiated contract modification.

3.1.4.2 Ship’s Force may elect to obtain separate lodging ashore during this contract performance period. Temporary service requirements for ship’s habitability may be adjusted accordingly. Service reductions may be the subject of a negotiated contract modification.

3.1.5 Quality Assurance

3.1.5.1 COR inspections in accordance with Reference (a).

3.1.6 Notes

3.1.6.1 Steam is not required.

END OF ITEM

3.2 Item 302: Drydocking and Routine Drydock Work

3.2.1 Work Description - Includes labor, material, and equipment for drydocking the ship, cleaning the hull, inspecting underwater body portions of the hull, and refloating the ship.

3.2.2 References

(a) NOAA Standard Specification AMC-997-1A, “Drydocking and Routine

Drydock Work”

(b) Drawing HB-085 FA04, “Docking Drawing”

(c) Drawing HB-163 FP19, “Sea Chest Diagram”

(d) Drawing HB-243 FM01, “Shafting Layout and Details”

(e) Tech Manual HB-244 (FRV40-225-006-010), “Stern Tube Bearing (Thordon Compac) and Shaft Seal (Kobelco)”

(f) Tech Manual HB-562 (FRV40-225-071-010), “High Performance Flap Rudder, Willi Becker”

(g) Naval Ships’ Technical Manual Chapter 081, “Waterborne Underwater Hull Cleaning of Navy Ships”

(h) NOAA Docking Report S0700/SWB997

3.2.3 Government Furnished Material

3.2.3.1 None

3.2.4 Requirements

3.2.4.1 Provide dry docking and routine dry dock work in accordance with Reference (a) and the following:

a. Dry dock the ship within 72-hours of ship’s arrival at the contractor’s facility.

b. Use Reference (b) blocking position 3 at a minimum keel block height of four feet for access to transducers and centerboard.

c. After positioning and before hauling the ship, conduct a diver’s inspection of underwater keel block positions relative to hull mounted transducers and associated fairings to verify that keel blocks will not come in contact with these fixtures.

d. Ensure that all transducers are covered in accordance with Reference (a), paragraph 3.11.6, prior to cleaning the ship’s hull via high pressure spray. DO NOT

SPRAY ANY TRANDUCER FACES OR WINDOWS WITH HIGH PRESSURE

SPRAY.

e. While the ship is in drydock, clean each transducer face or window from the hull bottom using a normal, mild, synthetic soap, water and a soft bristle brush. Only under extreme conditions use a piece of dull wood or very fine grade sand paper (by hand).

• Do not use strong solvents.

• Do not attempt to scrape with sheets of metal, screwdrivers or other metallic tools.

• Do not use high pressure water to clean the transducers or windows

f. Carefully inspect each transducer, transducer window, mounting hardware and seals for evidence of cracks, scrapes, blistering, corrosion or other anomalies that would indicate an unsound unit. Notify the COR immediately should any of these conditions are found.

g. Photograph and submit a report to the COR on each transducer and window cleaned. Photos should provide enough detail to clearly see the details of each transducer or window surface. Report should include transducer name, location, and condition remarks.

h. All transducers (except item 1 a , b, and c) are installed through to the hull in the Transducer room (4-23-0) located between frames 23 and 29, reference (a) The transducers and types are arranged as outlined in reference (b) and listed in table (x).

All acoustic windows are ¾” Plexiglas. Note that item 9A, Multibeam Sonar is not installed.

• Item 1 (a) is installed in the transducer room, but in a flooded void.

• Item 1 (b) is also installed in a flooded void but is located just above the screw.

• Item 1 (c) is covered under another specification

• Item 5A is installed in a flooded void and is covered by another specification, but the hull side window cleaning is included in this work item.

Table 3.2.1: Transducers Item Equipment Name Manufacturer Model Type

1 Self Noise Hydrophone (a), (b) and (c)

Harris Acoustic Products

HAP-5050 Window

2 Ship's Depth Finding Transducer Furuno CA50B-68 / FE-

Face

3 Speed Log Transducer Sperry Marine SRD 500 Face

4 Electromagnetic Speed Log Transducer

C.Plath NAVIKNOT III Face

5A Acoustic Doppler Current Profiler (ADCP) Transducer

RDI (Ocean Surveyor)

ES 18 Window

8 Fish Finding Transducer Simrad 50/200 D Face

9A Multibeam Sonar Not Installed

10 Passive Sonar Transducer AIRMAR 41065-1-01 Face

15 ME-70 Transducer Simrad ME-70 Face

3.2.4.2 Inspect all other shell plate openings listed on sheet 6 of References (b), (c), and (d).

Provide results on a condition report.

3.2.4.3 Measure and record stern tube bearing wear down readings, specifically the shaft-to

Thordon stern tube bearing clearance in accordance with Reference (e) for bearing details.

3.2.4.4 Inspect rudder sections to the extent possible without removing rudder welded access plates in accordance with Reference (f). Remove bolted covers or obstructions, measure Neck Bearing, Rudder Hinge, Link System slide bolt to slide bushing clearance, completing the BEARING CLEARANCES table. Perform an inspection of the rudder with COR, providing for a man-lift or scaffolding to reach all rudder areas. Provide results on a condition report. Notify ABS surveyor of availability for inspection.

3.2.4.5 In addition to feeler gage measurements of bearing/shaft/pin clearances taken above, perform a test of the rudder and the rudder flap clearances by jacking the rudder forward, aft, port and starboard to determine amount of travel at a convenient location to attach dial indicator measuring travel of the rudder with respect to the hull.

Measure and record travel and dial indicator location(s) on a condition report.

3.2.4.6 Remove rudder and rudder flap drain plugs and inspect for water leakage into the rudder and flap. Renew and reinstall plugs upon receipt of condition report response.

3.2.4.7 Inspect existing hull mounted zincs for wastage. These are nominal 23 pound bolted strap type measuring 1-1/4 inch x 6 inch x 12 inch. Check all bolts for tightness.

Record condition and location of zincs to document existing conditions and determine cathodic protection system effectiveness. Ships designed zinc anode quantities and locations are as follows:

32 zincs in Bow Thruster Tunnel 06 zincs in Port Sea Chest

06 zincs in Starboard Sea Chest

3.2.4.8 Remove void drain plugs listed below and inspect for water intrusion. Record results on a condition report. Fill and drain or float coat voids and rudder with rust preventive compound complying with MIL-C-16173, Grade 5, or Eureka Fluid Film Liquid A or equal. Reinstall void drain plugs using ABS approved thread anti-seize sealant on all plugs:

Skeg drain plug frame 87-88 starboard Aft stern tube structure Port & starboard bilge keels Rudder and rudder blade/flap

3.2.4.9 Clean/polish the propeller blades in accordance with Reference (g), section 081-3.3 and Table 081-3-2.

3.2.4.10 After the propeller has been cleaned and polished, contact the COR to inspect the propeller. After COR inspection, protect the propeller with padding to prevent damage until just prior to undocking.

3.2.4.11 Record hull inspection results on Reference (h) in lieu of Docking Report form 2410 in Reference (a).

3.2.5 Quality Assurance

3.2.5.1 COR inspections in accordance with Reference (a).

3.2.6 Notes

3.2.6.1 None

3.3 Item 303: Sea Valve Overhauls

3.3.1 Work Description - Includes labor, material, and equipment for sea valve overhauls, one new sea valve installation, and sea chest vent pipe flushing.

3.3.2 References

(a) NOAA Standard Specification AMC-505-1B, “Valve Overhaul and Test”

3.3.3 Government Furnished Material

3.3.3.1 None

3.3.4 Requirements

3.3.4.1 Remove, overhaul, test, and reinstall sea valves listed in Table 3.3.1 below in accordance with Reference (a). The term “overhaul” used in Reference (a) shall be redefined for this work item to be the same as “rebuild” is defined in NOAA Standard Specification MOC-000-1G. In lieu of overhaul, the Contractor may renew any valves equal to or smaller than three (3) inches. Contact the local ABS Surveyor to witness the testing of the sea valves.

3.3.4.2 Replace all existing steel threaded fasteners with stainless steel.

3.3.4.3 Apply an anti-seize lubricant to fastener threads prior to installing and tightening.

3.3.4.4 Replace rubber seat gasket flappers in all scupper valves.

3.3.4.5 Inspect scupper valve pins for excessive wear or corrosion.

3.3.4.6 Open all four (4) sea chest strainer (simplex) strainers for inspection by the local ABS

Surveyor.

3.3.4.7 Flush all sea chest vents from weather deck vent fittings down through sea chests using water with 100 psig water pressure to remove all mud, slime, and loose rust particles.

Sea Valve List Table 3.3.1

System Valve ID Size Valve Type Miscellaneous

Main Sea Water Valves, Sea Chest Vent’s and Air Purge Valves in Engine Room Sea Chest Inlet Stbd Fr

163-VL-01 10” Gate, Bronze, Flanged

Sea Chest Vent Stbd 506-VL-50

AKA 163-

VL-11

2” Gate, Bronze, Flanged

Sea Chest Air Blowdown Stbd

551-VL-70

AKA 163-

VL-07

¾” Gate, Bronze, Flanged

Sea Chest Inlet Port Fr 61

163-VL-02

10” Gate, Bronze, Flanged

Sea Chest Vent Port 506-VL-49

AKA 163-

VL-10

2” Gate, Bronze, Flanged

Sea Chest Air Blowdown Port

551-VL-69

AKA 163-

VL-08

¾” Gate, Bronze, Flanged

Sea Chest Warm Up Stbd Fr 62-63

163-VL-03 6” Gate, Bronze, Flanged

Stbd Ovbd Fr 71- 72

256-VL-23 10” Check, Bronze, Flanged

Port Ovbd Fr 71-72

256-VL-24 10” Check, Bronze, Oily Water Separator Ovbd

593-VL-47 1” Gate, Bronze, Flanged

Stern Tube Supply 256-VL-48 1 ¼” Globe, Stainless Steel, Evaporator Dump Ovbd 1 ½” Gate, Bronze, Flanged Meets Mil-V-1189

Scientific Sea Water System Valves in Engine Room Sea chest inlet Fr 12 Lower

524B-VL-

2” Butterfly Ductile iron & Polypropylene lined

ASTM D4104

Sea chest inlet Fr 12 Upper

524B-VL-

2” Butterfly Ductile iron & Polypropylene lined

ASTM D4104

Egg Pump Sea Chest Inlet Stbd Fr 53-55

524-VL-45 6” Butterfly, lugged, bronze

Auxiliary Sea Water Valves in Engine Room

Overboard Valve 524-VL-11 2 ½” Scupper Gag valve, Bronze

Overboard Valve 524-VL-12 2 ½” Scupper Gag valve, Overboard Valve 524-VL-23 5” Scupper Gag valve, Overboard Valve 524-VL-33 2 ½” Scupper Gag valve, Marine Sanitation Device in Domestic Equipment Room MSD Obvd 524B-VL-

3” Gate, Bronze, Flanged

Firemain System in Bow Thruster Room Fire Pump Sea Chest Inlet

163-VL-05 4” Gate, Bronze

Fwd Sea Chest Vent 506-VL-48

AKA 163-

VL-09

2” Gate, Bronze, Flanged

Fwd Sea Chest Air Blowdown

551-VL-68

AKA 163-

VL-06

¾” Gate, Bronze, Flanged

Doppler Speed Log Hull Isolation Valve in Transducer Void Frame 27-28 2 ft port of CL , lower level transducer void

No Mark No.

8” Gate Ships ET will remove/replace the Doppler speed log.

3.3.5 Quality Assurance

3.3.5.1 After completion of all work and prior to preservation, perform a hydrostatic pressure test on strainers at a pressure of 60 psig. Hold the pressure for ten minutes.

3.3.6 Notes

3.3.6.1 None

3.4 Item 304: Zinc Renewals

3.4.1 Work Description - Includes labor, material, and equipment to renew forty-four existing zinc anodes.

3.4.2 References

(a) Drawing HB-085 FA04, “Docking Drawing”

(b) Drawing HB-163 FP19, “Sea Chest Diagram”

3.4.3 Government Furnished Material

3.4.3.1 None

3.4.4 Requirements

3.4.4.1 Renew existing hull mounted zinc anodes. These anodes are nominal 23 pound bolted strap type measuring 1-1/4 inch x 6 inches x 12 inches. Zinc quantity and locations are as follows:

32 in Bow Thruster Tunnel 06 in Port Sea Chest

06 in Starboard Sea Chest 44 total

NOTE: Do not install the new anodes until after the ship’s hull has been painted.

3.4.5 Quality Assurance

3.4.5.1 COR inspection.

3.4.6 Notes

3.4.6.1 None

3.5 Item 305: Cathodic Protection System Inspection & Replacement

3.5.1 Work Description - Includes labor, material, and equipment to inspect the ship’s cathodic protection system and replace the copper anodes and inspect and tune up the Cathelco anti foulant system. (Revised 09/21/15)

3.5.2 References

(a) Technical Manual HB-633 (FRV40-225-011-010), “Cathodic Protection System, Marimpress Model: ICCP 50A”

(b) Drawing HB-624 FE70, “Impressed Current Cathodic Protection Arr. & Det.”

(c) Drawing HB-163 FP19, “Sea Chests Diagram”

3.5.3 Government Furnished Material

3.5.3.1 Copper TZX27 Anodes 18 ea.

3.5.4 Requirements

3.5.4.1 Provide the services of a Cathelco factory-authorized field service technician to supervise evaluation, service, and repair of ship’s existing Cathelco Anti Foulant Protection System after the government furnished copper anodes have been replaced.

(Revised 09/21/15)

3.5.4.2 Prior to any work on this item, and before ship is drydocked, conduct an operational test of ship’s cathodic protection system in accordance with Reference (a). Ship’s Force will operate equipment. (Revised 09/21/15)

3.5.4.3 Inspect the Marimpress Impress Cathodic Protection System (ICCP) controller, reference cells, and anodes in accordance with Reference (a). Locations are as follows; use Reference (b) as a guide:

- Controller in Passage 1-7-01

- Reference Cells at Frame 24-25 (Located inside the port and starboard No. 2 fuel oil tanks)

- Anodes at Frame 81-82 (Located inside the Shaft Bossing Void)

3.5.4.4 Using a megohmmeter, measure and record resistance readings between each anode and the hull and between the reference cell and the hull. Readings should be greater than 10 megohms.

3.5.4.5 Open, pump out residual fuel, clean, and certify safe for entry Fuel Oil tanks 4-19-1

#2 Starboard and 4-19-2 #2 Port to gain access to Reference Cells.

3.5.4.6 Inspect reference cell in accordance with Reference (a) steps 4.1.2 and 4.2.2.3.

Unbolt and remove covers and inspect Reference Cell cofferdams from inside the hull and inspect for signs of leakage or corrosion. Inspect external reference cell surfaces for signs of damage. Clean and re-establish coating inside the cofferdam.

3.5.4.7 Open and certify safe for entry Shaft Bossing Void 4-78-0 manhole 4-78-2 to gain access to anodes.

3.5.4.8 Inspect anodes in accordance with Reference (a) steps 4.1.3, 4.2.2.1 and 4.2.2.1.

Unbolt and remove covers and inspect Anode cofferdams from inside the hull and inspect for signs of leakage or corrosion. Check that anodes are securely fastened to the hull. Check that mounting stud hole filler is intact. Examine anode dielectric shield for any sigh of damage. Report any evidence of damage or leakage on a condition report. Check cable connections to the anodes for continuity. Clean and re-establish coating inside the cofferdam.

3.5.4.9 Reinstall reference cell and anode cofferdam covers with new gaskets.

3.5.4.10 Close Fuel Oil tanks 4-19-1 #2 Starboard and 4-19-2 #2 Port with new gaskets.

3.5.4.11 Close out manhole cover 4-78-2 to Boss 4-78-0 with new gaskets.

3.5.4.12 In conjunction with Ship’s force, follow ship’s lockout / tagout procedures to secure all electrical power serving the anodes in the bow thruster compartment and in the engine room main sea chests.

3.5.4.13 Disconnect the wiring to each of the anodes in the bow thruster compartment and in the engine room main sea chests.

3.5.4.14 Renew the copper anodes in the bow thruster compartment (16 total) and the engine room main sea chests (2 total). See Reference (c) as a guide for the location of the anodes. When assembling the new anodes in the flange sleeves, place the following over the stud in this order: Insulating washer, steel washer, brass full nut and brass half nut. Tighten each 27mm nut to 70 ft-lbs with a torque wrench. Do not over tighten as the nuts will strip. Renew the flange gaskets. See Figures 3.5.1 and 3.5.2.

Figure 3.5.1 – Typical Copper Anode

Figure 3.5.2 – Section view of installed anode. Gasket and flange fasteners are not shown.

3.5.4.15 Rewire each of the anodes.

3.5.4.16 Upon completion of work clear lockout / tagouts.

3.5.4.17 After all work has been completed, and after the ship is refloated, conduct operational tests for manufacturer’s field service technician to adjust cathodic anti foulant (Revised 09/21/15) protection system parameters.

3.5.5 Quality Assurance

3.5.5.1 COR inspections in accordance with reference (a).

3.5.6 Notes

3.5.6.1 None

3.6 Item 306: Underwater Body Coating

3.6.1 Work Description - Includes labor, material, and equipment to prepare and re-coat underwater body coating system.

3.6.2 References

(a) NOAA Standard Specification MOC-631-3B, “Underwater Body Ablative

Coating System”

3.6.3 Government Furnished Material

3.6.3.1 None

3.6.4 Requirements

3.6.4.1 The existing coating system is an Ameron Coating System applied during the ship’s dry docking; therefore all new paint shall be Ameron brand only for compatibility and in conformity with ship’s Paint Schedule.

3.6.4.2 Prepare and coat the entire underwater body with a “Maintenance System” in accordance with the requirements in Reference (a) and as follows:

3.6.4.2.1 Perform Ultra High Pressure Water Jetting (UHP WJ) to prepare the underwater body for a “Maintenance System”. Sweep and spot the entire underwater body to a WJ-4 visual surface preparation standard, in accordance with SSPC-SP 12. Ensure that all nozzles used in preparing the surface area of the underwater body are a sweeping type nozzle. Note: The term “water jetting” essentially defines the same process as “hydroblasting” or “hydrojetting”, which is not to be confused with “high pressure water washing”.

3.6.4.2.2 Remove all loose paint which is not tightly adhered to the hull entirely down to bare metal. Surface preparation of those areas shall be spot blasted to a WJ-2 visual surface preparation standard, in accordance with SSPC-SP 12. To those spot blasted areas of the hull, apply a “Complete System” in accordance with Reference (a). For bidding purposes, the contractor shall assume 8,000 square feet of the ship’s underwater surface area will require this “Complete System”.

3.6.4.2.3 Complete all potential structural steel repairs, access cuts, NDT testing, and hull plate inserts below the waterline, in other items of these specifications, prior to applying the underwater body coating system.

3.6.4.3 The complete coating system consists of:

3.6.4.3.1 Two coats, 5.0-6.0 mils DFT each, Amercoat 235 epoxy. The first coat may be any color, but the second coat shall be gray.

3.6.4.3.2 Three coats, 4.0-5.0 mils DFT each, ABC #3 ablative antifoulant. The first and third coats shall be red and the second coat shall be black, except in the boottopping all three coats shall be black.

3.6.4.4 The maintenance coating system consists of:

3.6.4.4.1 To all water jetted areas, apply a complete 5-coat coating system same as specified above for the “complete system”. The first coat is to be applied as soon as practical after surface preparation and before any rusting occurs. In no case shall the surfaces be allowed to remain overnight without coating.

3.6.4.4.2 To all prepared surfaces that are not water jetted, apply two new coats, 4.0-5.0 DFT each of the same ablative antifoulant as existing (last three coats of one of the complete systems specified above). The first new coat shall be black and the second new coat shall be red, except in the boottopping both new coats shall be black.

3.6.4.5 Upon completion of all coatings in this item and removal of all covering materials, perform low pressure water washing of the hull and all other weather areas of the ship using clean fresh water, to clean all dust, dirt, and debris from the ship. Cover all deck drain openings and strainer plates to prevent grit and blast materials from clogging the ship’s deck drainage system. After all coatings and clean ups are complete, flush ship’s deck drainage system to ensure all debris has been removed.

3.6.5 Quality Assurance

3.6.5.1 Conduct joint inspection of hull with Ameron Coatings Company representative after hull has been high-pressure water-washed. Provide detailed “Paint Plan” in accordance with Reference (a), paragraph 4.1.2, to COR prior to starting surface preparation.

3.6.5.2 Conduct joint temperature and humidity readings with Ameron Coatings Company representative prior to each coat of paint applied.

3.6.5.3 Verify all transducers are protected prior to surface preparation and painting as identified in Reference (a).

3.6.5.4 Conduct joint inspection of Dry Film Thickness with Ameron Coatings Company representative gaging after each coat of paint is applied.

3.6.6 Notes

3.6.6.1 In accordance with SSPC-SP 12, Ultra High Pressure Cleaning (UHP WJ) is surface preparation cleaning performed at pressures above 170 MPa (25,000 psi).

3.7 Item 307: Bow Thruster Inspection

3.7.1 Work Description - Includes labor, material, and equipment to take clearance readings and to inspect the bow thruster pinion/gear wheel teeth.

3.7.2 References

(a) Tech Manual HB-568 (FRV40-225-008-010), “Bow Thruster Model: 40 T3S”

3.7.3 Government Furnished Material

3.7.3.1 None

3.7.4 Requirements

3.7.4.1 Replace the lubricating oil in the bearing assemblies and the lube oil tank in accordance with Reference (a). Properly dispose of the old lube oil.

3.7.4.2 Perform the following dimensional checks in accordance with Reference (a) and provide the COR with a condition report on all readings:

CLEARANCES

40T3S - G673W

AS

Recommended allowance in operation

INSPECTION METHOD

Gland Neck Ring/Shaft Sleeve Radial Clearance

0.65 2.00 Max. Upon removal of gland packing (This should be changed at each docking) check radial clearance with feeler gauges.

Rotor Tip/Linear Radial Clearance

1.82 3.80 Max. Check with feeler gauges at mid point on rotor blade on all 4 blades. Use average reading from 2 opposite sides in case shaft is leaning in dock.

Rotor/Guide Vane Hub Clearance

7.50 7.30 Min. Measure gap from bottom face of rotor boss to top of guide vane hub below.

Discharge Deflector/Guide Vane Shell Chamfer Clearance

1.00 0.95 Min. Slide arm between vanes in the deflector and check gap with feeler gauges. This will only be possible in 2 locations (Port and Starboard if deflector is facing forward and aft).

Discharge Deflector 0.05 0.25 Max. Using a bar gently lever one side of the

NOTE: In order to access the Pinion/Gear Wheel Teeth a section of the hull plating

(approximately 6 inches by 4 inches) must be cut out just below the steering gear.

Once the plate has been cut out you will be able to access the pinion and deflector gear teeth by removing the pinion guard (item 15) located under the ship and held by 2 M20 bolts (item 114). Upon reinstallation of the pinion guard install new fan disc washers (item 206) onto two new M20 bolts (item 114) and hold with Loctite.

3.7.4.3 Remove the existing gland ring packing, thoroughly clean the gland and shaft and provide and install new gland packing.

3.7.4.4 Upon completion of all work reinstall the removed hull section and preserve per

Basic Item 306.

3.7.5 Quality Assurance

3.7.5.1 COR inspections.

3.7.6 Notes

3.7.6.1 None

Radial Wobble about true centre deflector. With clock gauge other side and record movement. NOTE: Do not apply too much pressure as you can see from the table the movement should be minimal.

Pinion/Gear Wheel Tooth Clearance

0.10 1.50 - 2.00 Max. Remove pinion guard as described below. Check with feeler gauges between engaging teeth of pinion and deflector gear ring.

3.8 Item 308: Ground Tackle Inspection and Preservation

3.8.1 Work Description – Includes labor, material and equipment required to remove the ground tackle from the ship and sandblast, perform required inspection and to preserve the ground tackle.

3.8.2 References

(a) NOAA Standard Specification AMC-581-1A, “Inspection and Preservation of

Ground Tackle”

3.8.3 Government Furnished Material

3.8.3.1 None

3.8.4 Requirements

3.8.4.1 Remove the port and starboard anchor chains. Renew the first shot of each chain

(section attached to their respective anchors). Renew the anchor swivels and pear links.

3.8.4.2 Sandblast or Ultra High Pressure (UHP) water jetting, IAW SSPC-SP-12, WJ3, inspect, test, preserve and reinstall the port and starboard anchor chains in accordance with Reference (a). Provide the services of the local ABS surveyor to inspect the chain and to witness all dimensional tests. Coordinate the removal of the chains with the deck department. Preserve the anchor chains and anchors with PPG-Ameron 302H and 385 Black in accordance with Reference 2.1.4.

3.8.4.3 While the anchor chains are removed from their respective lockers, clean and inspect the interior of each locker and provide the COR with a condition report on the findings. Contact the local ABS surveyor to inspect the anchor chain lockers.

3.8.4.4 Power tool clean and preserve 10 percent of each chain locker interior at locations to be determined by the COR.

3.8.4.5 After completion of all work, coordinate the reinstallation of the anchors and chains with the deck department.

3.8.5 Quality Assurance

3.8.5.1 COR inspection in accordance with Reference (a).

3.8.6 Notes

3.8.6.1 There are 12 shots of chain in the starboard chain locker and 10 shots of chain in the port chain locker. The chain is Ø36mm, grade 3.

3.9 Item 309: Rudder / Tail Shaft Removal and Inspection

3.9.1 Work Description - Includes labor, material, and equipment to remove, inspect, repair and reinstall the rudder, propulsion shaft and shaft seal assembly.

3.9.2 References

(a) Tech Manual HB-562 (FRV40-225-071-010), “High Performance Flap Rudder, Model: Becker FKSR”

(b) Drawing HB-562 FM02, “Rudder Arrangement”

(c) Drawing HB-243 FM01, “Shafting Layout & Details”

(d) NOAA Standard Specification AMC-240-1, “Propulsion Shaft and Propellers”

(e) Tech Manual HB-244 (FRV40-225-006-010), “Stern Tube Bearing (Thordon

Compac) and Shaft Seal (Kobelco)”

(f) SKF Instruction File SKF C 3184 KM, “CARB Bearing Dismounting”

(g) Tech Manual HB-633 (FRV40-225-011-010), “Cathodic Protection System, Marimpress Model: ICCP 50A”

(h) Tech Manual HB-243 (FRV40-225-099-010), “Marine Shaft Braking System, Twiflex Model: T40-EN Caliper(s) with 20:1 Air/Hydraulic Intensifier”

(i) SKF Instruction Number 81489, “The SKF OKV Coupling Mounting &

Dismounting Instruction”

(j) SKF Drawing 25616 Rev 9, “Ovako Couplings AB”

(k) Drawing HB-XXX, “Line Shaft Bearing Foundation”

3.9.3 Government Furnished Material

3.9.3.1 Line Shaft Bearing, Split Bearing, 1 ea.

3.9.4 Requirements

3.9.4.1 Propulsion Shaft Alignment Analysis

3.9.4.1.1 Prior to the ship proceeding into the dry dock, provide an industry specific alignment expert with PE credentials to attend vessel to measure and report on main propulsion shaft bearing loads via strain gauge method. Strain gauges to remain installed on the shaft to allow for periodic measurement in the future. Record the bearing loads in Table 3.9.1:

Table 3.9.1: Measured Propulsion Shaft Bearing Loads (lbs) Bearing Vertical Horizontal Thrust Bearing Line Shaft Bearing Stern Tube Bearing

3.9.4.2 Rudder Removal

3.9.4.2.1 Prior to removing the rudder operate the rudder from hard over to hard over and record the total travel (in degrees) to each side. Time the rudder from hard over on one side to hard over on the other side and record the results. Time the rudder in each direction. Provide the COR with a report of all readings.

3.9.4.2.2 Attach temporary padeyes to the hull. Remove the Becker high performance flap rudder in accordance with References (a) and (b). Record widening pressures and axial pressures on a condition report and provide the condition report to the COR.

3.9.4.2.3 Disassemble the joint link system and inspect the slide bar and bushing and the link pin and bushing for wear in accordance with Reference (a), drawing R-2.41573.

3.9.4.2.4 Disassemble the rudder hinge pins and inspect the hinge pins, bushing, wear rings and thrust rings for wear in accordance with Reference (a), drawing R-2.41576.

3.9.3.2.5 Remove the lower cover (PC 18) on Reference (a), drawing R-1.41572.

3.9.4.2.6 Support the rudder stock and disassemble the sealing assembly shown of Detail Z of

Reference (a), drawing R-41572. Inspect the lip seal ring and O-rings for damage or wear.

3.9.4.2.7 Take bearing clearance measurements in accordance with reference (a) and fill in the

Bearing Clearances table in Reference (a). Provide a copy of the Bearing Clearances table to the COR.

3.9.4.2.8 Clean, preserve and lubricate all mechanical parts and areas that will be inaccessible after assembly in accordance with Reference (a) assembly drawing notes and lubricant table.

3.9.4.3 Tail Shaft Removal

3.9.4.3.1 Install temporary padeyes on the hull to allow for the propeller and tail shaft to be removed as an assembly. See Reference (c) for the dimensions and weights of the tail shaft and propeller assembly.

3.9.4.3.2 Remove the tail shaft and propeller assembly, as one unit, from the ship in accordance with Reference (d) and as follows:

3.9.4.3.2.1 Remove the rope guard assembly and store until the tail shaft and propeller assembly are reinstalled.

3.9.4.3.2.2 Disconnect the water supply to the stern tube seal and bearing assembly to the extent that the tail shaft can be removed. Store all removed parts until the tail shaft and propeller assembly are reinstalled.

3.9.4.3.2.3 Provide the services of a Kobelco OEM certified service rep to assist with the disassembly and reassembly of the shaft mechanical seal. Disassemble the Kobelco shaft seal assembly in accordance with Reference (e). Disassemble the entire assembly to allow for replacement of mounting gasket, inflatable seal, seal ring and O-rings. Store all removed parts until the tail shaft and propeller assembly are reinstalled. Note position of body fit bolts, PC 4 of Reference (e), drawing KW- 45001-0, for reinstallation in original position.

3.9.4.3.2.4 Disassemble / dismount the SKF CARB line shaft bearing assembly in accordance with Reference (f) to allow for shaft removal. Scrap the bearing and housing.

NOTE: The bearing foundation will need to be removed in order to completely disassemble the line shaft bearing.

3.9.4.3.2.5 Disassemble the shaft slip ring assembly as needed to allow for shaft removal. See

Reference (g), drawing P-C-2448. Store all removed parts until the tail shaft and

3.9.4.3.2.6 Disassemble the shaft brake assembly in accordance with Reference (h) to the extent needed to allow for shaft removal. Store all removed parts until the tail shaft and

3.9.4.3.2.7 Disassemble the hydraulic coupling (PC 11 of Reference (c)) in accordance with

References (i) and (j). Catch and properly dispose of all oil. Store and protect all parts until the tail shaft and propeller assembly are reinstalled. Prior to disassembly, record the existing “Pull Up” dimension, shown at 27mm in Reference (j). Provide a copy of the measurement to the COR.

Pull Up Dimension = ________ Recorded by: _______________________ Date: _________

3.9.4.3.2.8 Identify the position of the hydraulic coupling on the tail shaft so that this position can be restored at reassembly.

3.9.4.4 Tail Shaft Inspection

3.9.4.4.1 After the tail shaft and propeller assembly have been rigged out of the ship, move the tail shaft and propeller assembly to a temporary storage location. Support the shaft on supports spaced no more than six feet apart on center.

3.9.4.4.2 Provide the services of the local ABS surveyor to inspect the tail shaft.

3.9.4.4.3 Perform all measurements, inspections and test on the tail shaft in accordance with Reference (d).

3.9.4.4.4 Clean and polish the forward and aft sleeves (Reference (c), sheet 3, PC’s 2 & 3).

3.9.4.4.5 After all measurements, inspections and test have been performed on the tail shaft, reinstall the shaft.

3.9.4.5 Stern Tube Bearing Inspection

3.9.4.5.1 Clean all marine growth from the stern tube bearing water passages and sliding surfaces.

3.9.4.5.2 Measure and record the inside diameter of the stern tube bearing at 12 locations vertical and 12 locations horizontal.

3.9.4.6 Shaft Seal Assembly

3.9.4.6.1 Under the direction of the Kobelco OEM certified service representative, align and install the shaft seal assembly in accordance with Reference (e). Provide a condition report to the COR with all alignment measurements.

3.9.4.6.2 Restore sealing water pipe and hose.

3.9.4.7 Line Shaft Bearing Installation

3.9.4.7.1 Fabricate and install (or modify existing foundation as necessary) a new line shaft bearing foundation in accordance with Reference (k) to support the new bearing.

3.9.4.7.2 Under the direction of the Cooper Bearing OEM certified service rep mount the line shaft bearing and install the line shaft bearing foundation in coordination with the shaft reinstallation and in accordance with Reference (f). Ensure that the bearing is aligned properly.

3.9.4.8 Shaft Brake Reassembly

3.9.4.8.1 Reassemble the brake discs and calipers in accordance with Reference (h).

3.9.4.9 Hydraulic Coupling Reassembly

3.9.4.9.1 Reassemble the hydraulic coupling in accordance with References (i) and (j). Renew the Sealing, PC 4 of Reference (j).

3.9.4.9.2 Restore the hydraulic coupling to its original position with pull up reading the same as recorded in paragraph 3.9.4.3.2.7.

3.9.4.9.3 Record the hydraulic coupling pull up below and provide a copy to the COR.

Pull Up Dimension = ________ Recorded by: _______________________ Date: _________

3.9.4.10 Reinstall the shaft grounding assembly with new brushes in accordance with

Reference (g).

3.9.4.11 Rudder Installation

3.9.4.11.1 Renew all gaskets, seals and O-rings disturbed by disassembly of the rudder.

3.9.4.11.2 Reinstall the rudder in accordance with Reference (a).

3.9.4.11.3 Contact the COR to witness rudder pull up on the rudder stock. Record pull up distance and widening and axial pressures on the table in Reference (a). Pull up pressures are provided on Reference (a), drawing R-1.41547: Nominal 4.7mm, Minimum 3.8mm, Maximum 5.6mm. Provide the COR with a copy of the pressures and distances.

3.9.4.11.4 Weld the two access covers back on the rudder and perform MT or PT on all of the completed welds. Repair all deficiencies, if any.

3.9.4.12 Remove all temporary padeyes and preserve all disturbed steel areas in accordance with Reference 2.1.2 and 2.1.4 using a “Complete System”.

3.9.4.13 After the ship is back in the water provide an industry specific alignment expert with

PE credentials to attend vessel to measure and report on main propulsion shaft bearing loads via strain gauge method. The theoretical and allowable propulsion shaft bearing loads are shown in Table 3.9.2:

Table 3.9.2: Theoretical and Allowable Bearing Loads (lbs)

Bearing Max. Allowable Min. Allowable Prescribed (Straight Line) Thrust Bearing 19,125 2,000 8,720 Line Shaft Stern Tube 87,480 N/A 27,680

3.9.5 Quality Assurance

3.9.5.1 After the rudder has been installed operate the rudder from hard over to hard over and record the total travel (in degrees) to each side. Time the rudder from hard over on one side to hard over on the other side and record the results. Time the rudder in each direction. Provide the COR with a report of all readings.

3.9.6 Notes

3.9.6.1 Kobelco contact information is as follows:

Kobelco Eagle Marine, Inc.

366 Fifth Avenue, Suite 712 New York, NY 10001 Tel: 212-967-5575 Fax: 212-967-6966 www.kobelco-eagle.com

3.9.6.2 Below is one potential source for the bearing and propulsion shaft alignment:

Diehl Engineering Company PO Box 1573 26076 Iowa Avenue Kingston, WA 98346 Phone: 360-297-8781 Fax: 360-297-8784 Attn: Paul Diehl Email: pdiehl@diehlengineering.com http://www.kobelco-eagle.com/ mailto:pdiehl@diehlengineering.com

3.10 Item 310: Propulsion Shaft Thrust Bearing Inspection

3.10.1 Work Description – Includes labor, material, and equipment to open, inspect and reassembly the main propulsion shaft thrust bearing.

3.10.2 References

(a) Tech Manual HB-244 (FRV40-225-005-010), “Bearings, Lineshaft and Thrust;

Model: SKF and Michell Bearing”

(b) Tidewater Drawing 1307-72-H01, “Thrust Bearing Foundation Mods in Way of

Oil Cooler Removal”

3.10.3 Government Furnished Material

3.10.3.1 Thrust Bearing Cooler Assembly, 1 ea.

3.10.4 Requirements

3.10.4.1 Disassemble the propulsion shaft thrust bearing in accordance with Reference (a) and in conjunction with the tail shaft removal. Provide the services of an authorize Michell Bearings factory representative to oversee the disassembly, inspection and reassembly of the thrust bearing.

3.10.4.2 Clean and inspect all internal parts in accordance with Reference (a). Provide the

COR with a condition report stating the condition of all internal parts.

3.10.4.3 Modify the thrust bearing foundation in accordance with Reference (b) to allow the oil cooler to be removed. Install the government furnished oil cooler. Pressure test the new cooler prior to installation to ensure there are no leaks.