82-04-01 BOEING: Amendment 39-4315. Applies to Model 747 series airplanes, line numbers 147, 149, 154 through 535 and those airplanes modified in accordance with Boeing Service Bulletin No's. 747-57-2073 or 747-57-2086 or equivalent certificated in all categories which are equipped with fairing mounted (offwing) escape slides. Compliance is required within the next 1200 hours time-in-service after the effective date of this AD unless already accomplished. \n\n\tTo ensure the proper deployment and inflation of the fairing mounted (offwing) slides, accomplish the following: \n\n\tA.\tRig the fairing mounted (offwing) escape slide inflation firing mechanism in accordance with Boeing Alert Service Bulletin No. 747-25A2581, dated September 25, 1981, or later FAA approved revisions. \n\n\tB.\tAircraft may be ferried to a maintenance base for repair in accordance with FAR 21.197 and 21.199. \n\n\tC.\tAlternate means of compliance or other actions which provide an equivalent level of safety maybe used when approved by the Chief, Seattle Area Aircraft Certification Office, FAA Northwest Mountain Region.\n \n\tNOTE: Operators unable to determine the configuration of their airplanes (i.e., modification in accordance with Boeing Service Bulletin No. 747-57-2073 or 747-57-2086 or its equivalent) should determine the angle of rotation of the offwing slide fairing door from the closed position to the open position with the flaps in the zero or five unit position. If this angle is not approximately 180 degrees compliance with paragraph A of this AD is required. \n\n\tThe manufacturer's specification and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). \n\n\tAll persons affected by this directive who have not already received these documents from the manufacturer, may obtain copies upon request to 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 98108. \n\n\tThis amendment becomes effective March 21, 1982.