76-22-07 MCDONNELL DOUGLAS CORPORATION: Amendment 39-2759. Applies to McDonnell Douglas Model DC-9 series airplane, certificated in all categories, having American Safety Flight Systems, Inc. seat belt Model 444657 and 444660 installed on the flight attendant's seat located on the aft pressure bulkhead door. \n\n\tCompliance required within the next 1200 hours time in service after the effective date of this AD unless already accomplished. \n\n\tTo prevent possible injury to the occupant of the aft flight attendant's seat, accomplish either of the following: \n\n\t(a)\tInstall a placard on the flight attendant's seat, located on the aft pressure bulkhead door which reads: \n\n\t\t"DO NOT OCCUPY", or \n\n\t(b)\tReplace the bungee cord at the aft flight attendant's seat located on the aft pressure bulkhead door in accordance with McDonnell Douglas Service Bulletin 25-210, October 8, 1976, later FAA approved revisions, or in a manner approved by the Chief, Aircraft Engineering Division, FAA,Western Region. \n\n\tNOTE: The subject seat belts were installed at a particular time during factory production and may also have been installed in the field in accordance with Service Bulletin 25-147. \n\n\tThis amendment becomes effective December 10, 1976.