AD 83-15-05 R2

83-15-05 R2 BOEING: Amendment 39-4696 as amended by Amendment 39-4967 is further amended by Amendment 39-5176. Applies to Boeing Model 757 and 767 series airplanes certificated in all categories. To prevent loss of engine power due to fuel exhaustion resulting from erroneous fuel quantity indications, accomplish the following:

A. For Model 757 aircraft, replace Fuel Quantity Indicating System (FQIS) processor part number S345T002-310 with part number S345T002-350 in accordance with Boeing Service Bulletin 757-28A7 dated March 23, 1984, or later FAA approved revision, prior to April 1, 1985.

B. For Model 767 aircraft, replace Fuel Quantity Indicating System (FQIS) processor part number S345T002-41 with part number S345T002-42 in accordance with Boeing Service Bulletin 767-28A5 dated March 15, 1984, or later FAA approved revision, prior to April 1, 1985.

C. For Model 757 aircraft, continue an inspection program in accordance with Boeing Alert Service Bulletin 757-28A7, dated June 17, 1983, or later FAA approved revision, until FQIS processor part number S345T002-350 is installed.

D. For Model 767 aircraft, continue an inspection program in accordance with Boeing Alert Service Bulletin 767-28A5, dated June 12, 1983, or later FAA approved revision, until FQIS processor part number S345T002-42 is installed.

E. Alternate means of compliance with this AD which provide an equivalent level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.

F. Subsequent FAA-approved FQIS processors may be installed in place of part numbers S345T002-42 and S345T002-350 required by paragraphs C. or D., above.

All persons affected by this directive who have not already received appropriate service information from the manufacturer may obtain copies upon request to Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124-2207. These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or 9010 East Marginal Way South, Seattle, Washington.

Amendment 39-4696 became effective August 9, 1983. Amendment 39-4967 became effective January 25, 1985. This Amendment 39-5176 becomes effective January 6, 1986.