COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 747 Series Aeroplanes AD/B747/44 Amdt 1 Inboard Elevator Control Rods and Aft Quadrant 2/91 Applicability: Model 747 Line Numbers 001 through 635. Requirement: Action in accordance with the technical Requirements of FAA AD 90-25-10 Amdt 39-6822. Note: Boeing Alert SB 747-27A2253 Rev 4 refers. Compliance: As specified in the Requirement Document with effective date of 7 January 1991. Background: Country of origin AD. Amendment 1 references latest FAA AD 90-25-10 as requirement document, this superseded previous relevant FAA AD. Specifies effective line numbers of aircraft.