86-25-02 BOEING: Amendment 39-5479. Applies to Boeing Model 767 airplanes identified in Boeing Alert Service Bulletin 767-27A0062, dated January 24, 1986, certificated in any category. To prevent the uncommanded deployment of spoiler panels in flight as a result of a rotary variable differential transducer (RVDT) separation, accomplish the following within six months after the effective date of this AD, unless already accomplished: \n\n\tA.\tModify the flight control forward control quadrants in accordance with Boeing Alert Service Bulletin 767-27A0062, dated January 24, 1986, or later FAA-approved revisions. \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\tC.\tSpecial flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment ofthe replacements required by this AD. \n\n\tAll persons affected by this directive who have not already received the above specified service bulletin from the manufacturer may obtain copies upon request from the Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124. It may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington. \n\n\tThis amendment becomes effective January 12, 1987.