COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters AD/HU 369/16 Passenger Interior - Modification 6/75 Applicability: All model 369H with passenger interior in accordance with Hughes drawing 369H90035. Requirement: 1. Install two conspicuous placards worded: "DO NOT OCCUPY FOR TAKEOFF AND LANDING". The placards shall be located on the aft face of the forward divider, facing aft, centred on the divider above each seat cushion. 2. Modify the passenger interior by installing occupant head and back support to the aft facing seats in accordance with a scheme approved by the Secretary and remove the placards installed in accordance with para. 1 above. Compliance: For Para. 1 - Within 25 hours time in service after 21 May 1975. For Para. 2 - Before carriage of passengers in aft facing seats.