COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 747 Series Aeroplanes AD/B747/29 Fairing Mounted Escape Slide Firing Mechanism - Rigging Revision 12/81 Applicability: All model B747 aeroplanes with S/Nos. referenced in Boeing SB 747-25A2581 or with S/Nos. referenced in subsequent issues or revisions of that SB. Document: Boeing SB 747-25A2581. Compliance: Within 1200 hours time in service after 31 December 1981. Background: Failure of escape slide to inflate due to reduced fairing door travel restricting the inflation firing mechanism.