COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 747 Series Aeroplanes AD/B747/54 Amdt 1 Flap Track Bolts 13/87 Applicability: All models with line numbers 001 to 632, except 747SP aeroplanes. Requirement: Action in accordance with Boeing Alert SB 747-57A2234 R1. Note: FAA AD 86-18-06 refers. Compliance: As detailed in the Requirement Document. Background: This Amendment revises the Compliance statement to incorporate a 5000 flight cycle inspection threshold in accordance with the manufacturers SB.