AD 90-02-08

90-02-08 BOEING: Amendment 39-6470. Docket No. 89-NM-149-AD.

Applicability: All Model 727 series airplanes certificated in any category.

Compliance: Required within the next 3,000 landings after the effective date of this AD, unless previously accomplished.

To prevent nose and main landing gear failure to extend properly due to a disconnect of the landing gear control selector valve actuator arm, accomplish the following:

A. Modify the selector valve actuator arm and splined shaft, in accordance with Figure 1, of Boeing Service Bulletin 727-32-0372, dated May 11, 1989, or Revision 2, dated December 14, 1989.

B. 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 will either concur or comment, and then send it to the Manager, Seattle Aircraft Certification Office.

C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. 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, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington.

This amendment (39-6470, AD 90-02-08) becomes effective on February 12, 1990.