0905_A_Rudder sternframexam CPP repair.doc

USNS SIOUX

(T-ATF 171 )

DRYDOCKING

CONTRACT NO. N40442-10-R-XXXX

ITEM NO. 0905

CATEGORY "A"

7/27/2010 Rudder & CPP Stern Frame Examination / Repair

/Collins/GT

1.0

ABSTRACT

1.1 This item describes the requirement to inspect the rudders and stern frame area.

2.0 REFERENCES/ ENCLOSURES

2.1 MSC Standard Item No. 23, Rudder and Stern Frame Examination, revised 22 March 2010.

2.2 MSC Drawing, Rudder & Steering Assembly 4842963.

2.3 MSC Drawing, Rudder Carrier & Bearings 519-4842940.

2.4 Rudder and Propeller Lifting Gear Arr. 4842855.

3.0

DESCRIPTION/LOCATION/QUANTITY

3.1 Two rudders and associated rudder posts and the stern frame area. To include rudder stocks, rudder keys and rudder lock nuts.

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES: None

5.0 NOTES

5.1 The contractor and all subcontractors regardless of tier shall consult the General Technical Requirements (GTR) 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, 22, 23, and 29.

5.2 The contractor and all subcontractors regardless of tier are advised to review other work items under this contract, including but not limited to Work Item 001 through 099 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.

5.3 Rudder blades and stocks must be rigged off separately. Removal of the blades from the stocks is required before the stocks can be lifted out. Access openings for the stocks must be removed in way of rigging stocks up through the main deck.

5.4 Both rudders are equipped with a Ringfeder Locking Assembly. The condition of contact surfaces and proper tightening of the locking screws is important. Follow the manufacturer’s recommended procedure for locking screw installation and tightening sequence.

5.5 Final rudder alignment is to be witnessed by the MSC Port Engineer.

6.0

NOT USED

7.0 STATEMENT OF WORK

7.1 Accomplish the requirements of reference 2.1 In addition, accomplish the following work:

7.1.1 Temporarily remove and unship port & starboard rudders using reference 2.4 for guidance on rigging arrangements. Remove stock to inside facility.

7.1.2 Perform rudderpost wear down readings. Provide an “as found” condition report to the MSC Port Engineer.

7.1.3 Machine clean the rudder stocks in way of the taper areas, rudder blades, keyways, and keys. Clean and grease roller bearings. Clean Bores.

7.1.4 Prove proper fit/dimensions. Conduct a blue fit test of the rudder stock to the rudder blade to the satisfaction of the attending ABS surveyor. Submit an “as released” condition report to the MSC Port Engineer.

7.2 Reinstall rudders. Ensure proper torquing sequencing for the Ringfeder locking assembly. The attending ABS Surveyor & MSC rep shall witness all mechanical tightening.

7.2.1 Prior to reinstall, Grease upper and lower stock area.

8.0 GENERAL REQUIREMENTS: None additional

ASA9APACHE_20090406

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