0903_A_Polish_Bow_Thruster_Propeller.doc

USNS CARL BRASHEAR

(T-AKE 7)

DRYDOCKING AND UNDOCKING

N32205-13-R-3017

25 April 2013

ITEM NO. 0903

Category "A"

MSFSC/BVV/ALC

POLISH BOW THRUSTER PROPELLER-INSPECT SEALS

1.0 ABSTRACT

This item describes the requirements to polish the bow thruster propeller and inspect seals.

2.0 REFERENCES

2.1 T/M T9568-A2-MMC-01A, Bow Thruster Installation Manual, Type TT2200

3.0 ITEM LOCATION/DESCRIPTION

3.1 Location/Quantity

3.1.1 Location: Underwater hull, forward frame 13.

3.1.2 Quantity: One (1) Bow thruster propeller.

3.2 Item Description/Manufacturer's Data

3.2.1 Propeller Manufacturer:

Bow Thruster Manufacturer:

Rolls Royce, Inc Diameter – 2.2 Meters Number of Blades – 4 Blades, fixed-pitch type Material – Bronze-ABS-Type 4 Ni-Al Bronze

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES

4.1 Government Furnished Equipment (GFE): None

4.2 Government Furnished Material (GFM)

Seal Ring 992804 3 ea. O-Ring 92492 1 ea

Seal Ring 992808 2 ea Sleeve 311553 1 ea

O-Ring 90045 1 ea Seal Compound 992008 1 ea

4.3 Government Furnished Services (GFS): None

5.0 NOTES

5.1 The Contractor and all Subcontractors, regardless of tier, shall consult the General Technical Requirements (GTRs) to determine applicability to this work item. In performance of this work item, the Contractor and all Subcontractors, regardless of tier, must comply with the requirements of all applicable GTRs including but not limited to GTRs 1 through 7.

5.2 The Contractor and all Subcontractors, regardless of tier, are advised to review ALL other work items under this contract, to determine their effect on the work required under this work item. Many of the definitions relating to performance of this work item are found in Work Item 001.

6.0 QUALITY ASSURANCE REQUIREMENTS None Additional

7.0 STATEMENT OF WORK REQUIRED

7.1 Contractor is responsible to remove/re-install all interferences in way of the bow thruster propeller cleaning.

7.2 The Bow Thruster propeller will be temporarily removed for polishing.

7.3 Clean and buff bow thruster propeller blades and bow thruster propeller cap to bright metal.

7.4 Accomplish NDT-Dye Penetrant tests of all propeller blades, front and back, and including hub.

7.5 CHECKPOINT: Examine all areas of propeller blades, hubs, and fairwater cap. Inspect for cracks and defects paying particular attention to hub, blade roots and blade edges. MSCREP and ABS Surveyor shall attend. Provide a condition report of findings.

7.6 Contractor to provide one (1) GE Energy Power Conversion Project Manager, and one (1) Rolls Royce OEM technical representative to conduct the inspection of the bow thruster seals and liner.

7.7 Contractor to provide four (4) mechanics to assist the tech reps with the removal of the propeller and assist with the seal inspection.

7.8 Contractor to weld padeyes as required to accomplish the removal of the propeller. Remove trash bars as necessary to accomplish the work.

7.9 Contractor to provide staging for access to the bow thruster tunnel.

7.10 After inspection is complete, remove padeyes, re-install propeller, and paint areas where padeyes were installed. Re-install trash bars.

7.11 Provide a condition report of findings.

7.12 Preparation of Drawings / Reports

7.12.1 Final report shall be submitted to MSCREP detailing conditions found if, any repairs made, and results of final inspection.

7.13 Manufacturer's Representative

GE Energy Power Conversion POC: David Thornton

610 Epsilon Drive Pittsburg, PA 15238

Phone: 804-955-0015 Fax: 412-967-9422 Rolls Royce Commercial Marine Inc.

1731 13th Ave SW

Seattle, WA 98134-1009 USA

Phone: 206-782-9190, Fax: 206-782-0176

8.0 GENERAL REQUIREMENTS: None Additional

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