Airworthiness Directive 12-08-85  757

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 in service.

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.

This amendment becomes effective June 28, 1985.

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ADs have been found with wording seemingly drawing attention to "certain wire bundles" but stop short of identifying the wire insulation type as the problem. this 1985 AD here illustrates the point and begs the question "why are we talking "AGED WIRING" when this AD was written 15 years ago on a nearly new Monarch Airlines 757.