AD 85-02-01

85-02-01 BOEING: Amendment 39-4990. Applies to Model 747 airplanes equipped with B.F. Goodrich evacuation slides and slide/rafts, Part Numbers (P/N) as specified in B.F. Goodrich service bulletins noted below. Compliance required as indicated.

To assure proper inflation of slides and slide/rafts, accomplish the following within one year after the effective date of this amendment, unless previously accomplished:

A. For airplanes equipped with the B.F. Goodrich slides or slide/rafts noted in B.F. Goodrich Service Bulletin 25-090, Revision 1, dated May 10, 1984, replace pressure regulator O- rings in accordance with the service bulletin or later FAA approved revisions.

B. For Boeing Model 747-300 airplanes equipped with B.F. Goodrich slides P/N 7A1323, accomplish regulator replacement in accordance with B.F. Goodrich Service Bulletin 25-084, dated November 7, 1983, or later FAA approved revisions.

C. For airplanes equipped with slide/rafts installed in accordancewith Supplemental Type Certificates (STC) SA574GL, SA575GL, SA744GL, or SA745GL, accomplish pressure regulator O-ring replacement in accordance with B.F. Goodrich Service Bulletin 25-088, Revision 1, dated May 9, 1984, or later FAA approved revisions.

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

E. Upon request of the operator, an FAA maintenance inspector may adjust the compliance times specified in this AD to permit compliance at an established inspection period of the operator, if the request contains substantiating data to justify the adjustment period.

F. Aircraft may be ferried to a base for maintenance in accordance with Sections 21.197 and 21.199 of the Federal Aviation Regulations.

All persons affected by this directive who have not already received B.F. Goodrich Service Bulletins 25-084, 25-088, and 25-090 may obtain copies upon request to B.F. Goodrich Engineered Products Group, Aerospace Defense Division, Akron, Ohio 44318, or Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124. These documents may also be examined at FAA, Northwest Mountain Region, 9010 East Marginal Way South, Seattle, Washington.

This amendment becomes effective March 4, 1985.