Document ID: chunk:federal_register_of_legislation:F2006B02430:body:0
Version: federal_register_of_legislation:F2006B02430
Segment Type: other
Provision Reference: 
Character Range: 0–1014

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY
 SCHEDULE OF AIRWORTHINESS DIRECTIVES

 Auxiliary Power Units

AD/APU/12 Compressor Wheel 8/97

            Applicability: Sundstrand Aerospace T-62T-40C series Auxiliary Power Units incorporating Compressor Wheel, P/No 162690-1, 165111-1 or 167200-1

            Requirement: Replace affected compressor wheels in accordance with Sundstrand Aerospace Service Bulletin T-62T-49-120 Revision 2 dated 5 November 1996.

            Note: FAA AD 96-25-12 also refers.

 Compliance: As detailed in the requirement document.

            This airworthiness directive becomes effective on 17 July 1997.

            Background: The manufacturer has advised three compressor wheel failures have occurred as a result of fatigue cracks propagating from screw holes on the backface of the compressor wheel.

            Compressor wheel rupture could result in an uncontained APU failure and damage to an aircraft.