89-16-07 BOEING: Amendment 39-6278. \n\tApplicability: Model 747 series airplanes equipped with General Electric CF6-80C2 engines, as listed in Boeing Alert Service Bulletin 747-54A2129 dated June 8, 1989, certificated in any category. \n\n\tCompliance: Required as indicated, unless previously accomplished. \n\n\tTo eliminate the potential for a fire due to an inadequately sealed firewall in the outboard struts, accomplish the following: \n\n\tA.\tWithin the next 60 days after the effective date of this AD, modify the existing seal configuration in the aft outboard strut trailing edge fairing door/inconel pan area in accordance with the accomplishment instructions of Boeing Alert Service Bulletin 747-54A2129, dated June 8, 1989. \n\n\tB.\tAn 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. \n\n\tNOTE: 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. \n\n\tC.\tSpecial 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. \n\n\tAll persons affected by this directive who have not already received the appropriate service information from the manufacturer may obtain copies upon request to Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124. This information 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. \n\n\tThis amendment (39-6278, AD 89-16-07) becomes effective on August 11, 1989.