COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Airbus Industrie A319, A320 and A321 Series Aeroplanes AD/A320/17 Amdt 2 Auxiliary Power Unit 9/93 Applicability: Model A320 series 100 and 200 aircraft equipped with Garrett Auxiliary Power Unit GTCP 36-300 (A) P/N 3800278-2 but excluding APU's with serial numbers P-453, P-454, R-477 and subsequent and APU's modified in accordance with Garrett Service Bulletin GTCP36-49-6525 any revision. Requirement: Action in accordance with Garrett Service Bulletin GTCP36-49-6549. Compliance: By 2 April 1995. Background: This directive introduces a secondary containment shield as the result of a turbine rotor separation that occurred during a Garrett APU development bench test. Amendment 1 adopted the FAA closing requirement promulgated in AD 92-27-14 while this amendment revises applicability by excluding certain serial numbered items and items incorporating SB GTCP36-49-6525 as nominated in the FAA AD.