COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 737 Series Aeroplanes AD/B737/70 Thrust Reverser - Auxiliary Slider Track Liner 11/92 Applicability: All Model 737-300, -400 and -500 series. Requirement: Action in accordance with the technical requirements of FAA AD 91-25-06. Note: Boeing Service Bulletin 737-78-1048 Revision 1 refers. Compliance: As detailed in the Requirement Document with an effective date of 15 October 1992. Background: Inspection, repair and replacement as necessary of each thrust reverser auxiliary track, track liner and slider fitting has been prompted by two in-flight incidents in which a thrust reverser translating sleeve panel has separated from the aircraft.