COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 747 Series Aeroplanes AD/B747/107 Oxygen System - Pilots and Co-Pilots Oxygen Hoses Applicability: Model 747-400 series airplanes listed in the Requirement Document. 4/92 Requirement: Action in accordance with the technical requirements of FAA AD 92-02-06 Amdt 39- 8142. Note: Boeing Alert SB 747-35A2075 Revision 1 refers. Compliance: As specified in the Requirement Document with a revised effective date of 31 May 1992 for Australian registered aircraft. Background: This Directive requires inspection, and if necessary, replacement or rerouting of the oxygen hose supplying oxygen to the Captain's and First Officer's oxygen mask stowage boxes.