Tail Shaft Repair (PWS).pdf

USNS SACAGAWEA

(T-AKE 1)

RFQ NO. N32205-21-Q-2246

3 February 2021

ITEM NO. 0910

CATEGORY “A” MSC/N72/MKM

Tail Shaft Repair

2246-1

1.0 ABSTRACT

This work item describes transportation and repair for a T- AKE spare tail shaft.

2.0 Reference/Enclosure

2.1 Enclosure 1 - MSC N72 Engineering Report – T-AKE 1

Class Spare Propulsion Tail Shaft Repair Report.

2.2 Enclosure 2 - ABS Letter Task - T2064691, Spare Tail

Shaft Repair

Enclosures contain proprietary information and will be provided upon request to authorized personnel only.

3.0 ITEM LOCATION/DESCRIPTION

3.1 Location/Quantity

3.1.1 Location: Shaft storage yard, Charleston SC, Contractor site Machine Shop

3.1.2 Quantity: N/A

3.2 Item Description/Manufacturer's Data: None

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES

4.1 Government Furnished Equipment (GFE): None

4.2 Government Furnished Material (GFM): Spare Shaft

4.3 Government Furnished Services (GFS): None

4.4 Government Furnished Information (GFI): None

ITEM NO. 0910

2246-2

5.0 NOTES

5.1 All work shall be performed by or under the supervisor

of an Authorized WARTSILA Authorized Service Provider.

5.2 Period of Performance: 3/15/2021 – 9/30/2021

5.3 Performance Location: At Contractor’s facility

5.4 Assistant Type Desk point of contact;

Scott Alvey, Office 757-443-0979, Cell 757-803-4539, Email scott.alvey@navy.mil

5.5 COR point of contact;

Chris Lundquist, Cell 757-513-6457, Email christopher.lundqui1@navy.mil

6.0 QUALITY ASSURANCE REQUIREMENTS: None additional

7.0 STATEMENT OF WORK REQUIRED

7.1 Contractor shall arrange transportation of T-AKE tail

shaft from MSC Charleston Shaft storage yard to contractor’s machine shop.

7.2 Contractor shall uncrate and un-package shaft, inspect

and prepare for repairs.

7.3 Contractor shall see ref. 2.1 and ref 2.2 regarding

history of shaft, damage and recommended repair.

7.4 Contractor shall blast and clean shaft as necessary.

7.5 Contractor shall reduce the diameter to bring defect

into the range for a non-weld repair. On the basis that the defect is approximately 7.54mm deep and the rule requirement for a non-weld repair allows a mailto:scott.alvey@navy.mil mailto:christopher.lundqui1@navy.mil

ITEM NO. 0910

2246-3 maximum depth of 6.4mm, it is proposed that the diameter of the tail shaft in the vicinity of the defect be reduced approximately 2.3mm (2 x (7.54mm – 6.4mm)). The resultant diameter would be approximately 645.7mm, 4.52mm above the minimum required ice-class diameter. The length of the diameter reduction shall extend from 3556mm from the aft end of the shaft to 5156mm from the aft end of the shaft, the defect would be approximately in the center of this area. A sketch of the diameter reduction location is included in Attachment F Ref 2.1. Further, the sides of the remaining approximately 6.4mm deep defect shall be ground out to a radius of 161.5mm (646mm / 4). A sketch of the resultant fully radiused repair is included in Attachment G REF 2.1 showing the diameter of the “repaired” defect on the surface of the shaft would be approximately 74mm in diameter.

7.6 Contractor shall follow class requirement of smooth

surface finish and acceptable NDE shall be followed when the required radius is achieved.

7.7 Contractor shall complete repair of defect to

satisfaction of MSCREP and regulatory body local surveyor.

7.8 Contractor shall provide final report including Pre-

repair and Post-repair for following: NDT of machined area, shaft run out measurements, dimensions of repaired area post repair. Contractor shall provide post repair NDT of taper and NDT of liner.

7.9 Contractor shall install fiberglass coating IAW Naval

Standard MIL-STD 2199B and perform spark test to satisfaction of MSCREP and ABS surveyor.

7.10 Contractor shall preserve shaft as a class spare after

repairs, place in protective wooden crate for transportation and perseveration and storage.

7.11 Contractor shall transport shaft to MSC Charleston

shaft storage yard.

ITEM NO. 0910

2246-4

Recommended Contact:

Kristen Hoskinson Contract Administrator Collins Machine Works & CMMC Machine, LLC 2081 Hayter Street North Charleston, SC 29405

843.554.0993 (o)

843.554.1196 (f)

703.944.3631 (c) www.collinsmachine.net khoskinson@collinsmachine.net

OEM:

WARTSILA DEFENSE, INC.

3617 KOPPENS WAY,

CHESAPEAKE, VA 23323 2531

Phone: 757-996-5426 WEBSITE: http://www.wartsila.com

CAGE: 0EYA6

8. GENERAL REQUIREMENTS

8.1 NONE.

mailto:khoskinson@collinsmachine.net