76-22-05 MCDONNELL DOUGLAS CORPORATION: Amendment 39-2754. Applies to McDonnell Douglas Corporation model DC-10-10, -10F, -30, -30F, and -40 series airplanes, certificated in all categories, equipped with American Safety Flight Systems, Inc. seat belt model 443440 installed on aft facing flight attendants seats. \n\n\tCompliance required within the next 600 hours' time in service after the effective date of this AD, unless already accomplished. \n\n\tTo prevent possible unsafe buckle position of flight attendants seat belts, accomplish the following: \n\n\t(a)\tInstall a placard, which reads "DO NOT OCCUPY", on those flight attendant seats in the passenger cabin equipped with American Safety Flight System, Inc., seat belt model number 443440 until the seat belt installation is modified or replaced in a manner approved by the Chief, Aircraft Engineering Division, FAA Western Region. The seats prohibited from use must be secured in normally stowed position or removed. \n\n\t(b)\tReplaceAmerican Safety Flight System, Inc. seat belt model number 443440 installed on lower lobe galley seats with ordinary adjustable seat belts without retractors in accordance with normal maintenance practices. Alternate seat belt installations may be approved by the Chief, Aircraft Engineering Division, Federal Aviation Administration, Western Region. \n\n\tThis amendment becomes effective December 10, 1976.