AD 85-12-08

85-12-08 BOEING: Amendment 39-5081. Applies to Boeing Model 757-200 series airplanes, certificated in all categories, listed in Boeing Service Bulletins 757-38-008 dated February 1, 1985, and 757-24-0025 dated May 3, 1985. To prevent the electrical shorting of certain wire bundles due to damaged wire and leaking lavatory waste fluids onto the wire, accomplish the following within the next 50 hours time in service after the effective date of this AD, unless already accomplished:

A. Perform a visual inspection of the forward lavatory waste drain ducts, to determine if there is any leakage from the duct seals. Repeat the inspection at intervals not to exceed 100 hours time in service.

B. If leaks are detected, clean and replace forward lavatory waste drain clamps in accordance with Boeing Service Bulletin 757-38-008, dated February 1, 1985, or later FAA approved revision, and continue to inspect in accordance with paragraph A. at intervals not to exceed 250 hours time inservice.

C. Incorporation of Boeing Service Bulletin 757-38-008 dated February 1, 1985, or later FAA approved revision, to replace specified narrow clamps with wider clamps on the forward lavatory waste ducts, and incorporation of Boeing Service Bulletin 757-24-0025 dated May 3, 1985, or later FAA approved revision, to replace the damaged wire and to reroute the specified wire bundles from beneath the lavatories, terminates the repetitive inspection requirement of paragraph A., above.

D. Alternate means of compliance which provide an acceptable level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.

E. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of inspections and/or modifications required by this AD.

All persons affected by this proposal who have not already received copies of the service bulletins may obtain copies upon request from the Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124. These documents may be examined at the FAA, Northwest Mountain Region, 1900 Pacific Highway South, Seattle, Washington, or 9010 East Marginal Way South, Seattle, Washington.

This amendment becomes effective June 28, 1985.