COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 747 Series Aeroplanes AD/B747/110 Doorstop Support Fitting 6/92 Applicability: Model 747 series, line numbers 001 through 113. Requirement: Action in accordance with the technical requirements of FAA AD 92-02-01 Amdt 39- 8137. Note: Boeing ASB 747-53A2326 refers. Compliance: As specified in the Requirement Document. Background: Reports have been received of cracks in certain doorstop fittings at the forward edge of number 5 main entry doors. This Directive requires on-going repetitive inspections until optional terminating action is instigated.