AD 88-19-05

88-19-05 BOEING: Amendment 39-6002. Applies to Model 767 series airplanes, equipped with Pratt and Whitney JT9D-7R4D, -7R4E, or -7R4E4 engines, or General Electric CF6-80A or -80A2 engines, certificated in any category.

Compliance required within 180 days after the effective date of the AD, unless previously accomplished.

To preclude the spread of engine fire to other parts of the airplane through a gap in the engine firewall, accomplish the following:

A. Accomplish either paragraph A.1., or A.2., below.

1. Install a firewall seal to cover a gap located between the engine core cowl and thrust reverser cowl at the pylon to cowl fillet fairing, in a manner approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.

2. Install a firewall seal assembly in accordance with Boeing Alert Service Bulletin 767-54A0027, dated June 2, 1988, for airplanes equipped with Pratt and Whitney JT9D- 7R4D, -7R4E, or -7R4E4 engines; or Boeing Alert Service Bulletin 767-54A0028, dated June 10, 1988, for airplanes equipped with General Electric CF6-80A or -80A2 engines.

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 may add any comments 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, 17900 Pacific Highway South, Seattle, Washington, or Seattle Aircraft Certification Office, FAA, Northwest Mountain Region, 9010 East Marginal Way South, Seattle, Washington.

This amendment, 39-6002, becomes effective September 26, 1988.