AD 81-18-03

81-18-03 GENERAL ELECTRIC: Amendment 39-4195. Applies to all fuel controls on General Electric CT58 turboshaft engines. Accomplish in accordance with General Electric Alert Service Bulletin CT58 (A73-71) CEB-261, Revision 1, dated January 9, 1981.

1. Compliance required prior to the first flight of each day or until paragraph 2 is accomplished.

a. Check lead lag servo housing attachment screws to make sure there are no signs of looseness and that none are missing or broken.

b. Check lock wire to make sure it is not loose.

c. Check lead lag servo housing to make sure it is secure.

d. If a screw is missing or broken, remove the fuel control and replace it with a serviceable fuel control prior to further flight.

NOTE: Signs of lock wire, screw, or lead lag servo housing looseness may be an indication of screw breakage.

2. Compliance required within the next 100 hours time in service after the effective date of this AD.

a. For fuel control,S/N 28090 and above, replace screws P/Ns 69691A64, 69691A65, and 69691A69 with P/Ns NAS1352N3H10 AND NAS1352N3H24.

b. For fuel control S/N 28089 and below, remove lead lag servo housing screws, perform a counter bore check and replace with the appropriate set of NAS1352N3H screws.

NOTE: 1. For fuel controls, A/N 28089 and below, that have previously complied with the original General Electric Service Bulletin, CT58 (A73-71) CEB-261, dated December 24, 1979, compliance with Part 2b of this AD.

2. Replace screws one at a time.

Later FAA approved revisions or equivalent means may be approved by the Chief, Engineering and Manufacturing Branch, New England Region.

Upon request of the operator, an FAA maintenance inspector, subject to prior approval of the Chief, Engineering and Manufacturing Branch, New England Region, may adjust the replacement interval specified in this AD to permit compliance at an established inspection period of the operator if the requestcontains substantiating data to justify the increase for that operator.

The manufacturer's specifications and procedures identified and described in pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive, who have not already received these documents from the manufacturer, may obtain copies upon request to General Electric Company, 1000 Western Avenue, Lynn, Massachusetts 01910. These documents may also be examined at FAA, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803, and at FAA Headquarters, 800 Independence Avenue, S.W., Washington, D.C.

This amendment becomes effective September 17, 1981.