AD 85-25-55

85-25-55 BOEING: Amendment 39-5326. Applies to all Model 747 series airplanes, line number 1 through 607, powered by General Electric CF6 or Pratt & Whitney Aircraft JT9D-70A turbofan engines, certificated in any category.

To prevent failure of the Engine Number 1 control cable which may cause loss of control of the engine, accomplish the following, unless previously accomplished:

1. Within 48 hours following receipt of this AD, and thereafter at intervals not to exceed 600 flight hours, perform inspections and repair, if necessary, in accordance with Boeing Alert Service Bulletin 747-76A-2063, Revision 1, dated December 18, 1985, or later FAA- approved revisions.

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

3. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a basefor the accomplishment of inspections and modifications required by this AD.

4. Modification of the Engine Number 1 engine control cable in accordance with Boeing Service Bulletin 747-76-2063, dated July 12, 1985, constitutes terminating action for 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 Airplane Company, P.O. Box 3707, Seattle, Washington 98124. These documents may also be examined at FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington.

This AD was effective earlier to all recipients of telegraphic AD T85-25-55 issued December 20, 1985.

This amendment becomes effective June 23, 1986.