AD 88-20-07

88-20-07 BOEING: Amendment 39-6024. Applies to all Model 727 series airplanes, certificated in any category.

Compliance required as indicated, unless previously accomplished.

To prevent jamming of the main landing gear door actuator caused by fracturing of the pivot trunnion, accomplish the following:

A. Within the next 1,600 flight cycles after the effective date of this AD, accomplish the visual inspection of the main landing gear door actuator pivots in accordance with Boeing Service Bulletin 727-32-0358, dated May 31, 1988. Repeat this inspection at intervals not to exceed 800 flight cycles.

B. If any of the pivot trunnion shafts are found loose or missing during the inspection performed in accordance with paragraph A., above, prior to further flight, replace the pivot in accordance with Boeing Service Bulletin 727-32-0358, dated May 31, 1988.

C. Accomplishing the pivot replacement with a part number 3-3141-54 pivot, in accordance with Sargent Controls Service Bulletin 7-3141-32-06, Revision 1, dated November 2, 1987, constitutes terminating action for the initial and repetitive inspections required by paragraph A., above.

D. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.

NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who may add any comments and then send it to the Manager, Seattle Aircraft Certification Office.

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

This Amendment, 39-6024, becomes effective November 1, 1988.