89-15-08 BOEING: Amendment 39-6269. \n\tApplicability: All Model 737 series airplanes through line number 1581, equipped with a second observer's seat, certificated in any category. \n\n\tCompliance: Required as indicated, unless previously accomplished. \n\n\tTo ensure structural integrity of the second observer's seat, accomplish the following: \n\n\tA.\tWithin 30 days after the effective date of this AD, install a placard above the second observer's seat, stating: "NO OCCUPANCY." This placard may be removed once the terminating action of paragraph B., below, has been accomplished. \n\n\tB.\tWithin 6 months after the effective date of this AD, inspect the second observer's seat installation for missing fasteners, in accordance with Boeing Service Letter 737-SL-25-41, dated October 14, 1988, or Boeing Service Letter 737-SL-25-41-A, dated April 20, 1989. If fasteners are found to be missing, repair prior to further flight, in accordance with the service letter. \n\n\tC.\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\tD.\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 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, Transport Airplane Directorate, 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. \n\n\tThis amendment (39-6269, AD 89-15-08) becomes effective on August 24, 1989.