COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Piper PA-36 (Pawnee Brave) Series Aeroplanes AIRWORTHINESS DIRECTIVE For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD)AD/PA-36/6 Amdt 2 and issues the following AD under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section. AD/PA-36/6 Amdt 3 Applicability: All models. Wing Structural Fatigue Limitations 7/2000 Requirement: Retire the following components from service at or before the component times in service indicated: Component Part No. Retirement Life Hours Aircraft Affected Wing carry-thru spar fittings 97713-00 4100 7360001 and subsequent 97713-02 7802001 and subsequent 97713-03 Wing spar fittings 97712-00 4100 7360001 and subsequent 7802001 and subsequent Spar carry-thru assembly 97370-00 2350 7360001 to 7560003 Spar carry-thru assembly 76824-02 4100 7660123 and subsequent 7802001 and subsequent Spar carry-thru assembly 76767-00 3510 7560004 to 7660122 Spar assembly 97701-00 Rev. N and earlier 97701-01 Rev. N and earlier (Original fitment) 7360001 to 7560055 764393 and 764394 Upper and lower spar caps Spar cap replacement kits 3100 4100 Spar assembly 97701-00 Rev. P and later 97701-01 Rev. P and later (Original fitment) 7560056 and subsequent 764393 and 764394 7802001 and subsequent Upper and lower spar caps Spar cap replacement kits 4100 4100 Wing attachment bolts 77245-00 Lower 2000 7360001 and subsequent Upper 4100 7802001 and subsequent Note 1: Replace upper or lower bolt each time bolt is removed. Note 2: Piper SB 744 and FAA AD 83-20-03 refer to this subject. COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Compliance: As detailed in the Requirement table. This Amendment becomes effective on 13 July 2000. Background: The initial issue of this directive was raised to promulgate the wing and carry-thru structure fatigue life limitations, which were based on the results of a comprehensive program of full scale fatigue tests conducted by the manufacturer. Subsequent amendments updated the lives as the test program continued; and consolidated the content with that of other directives. There are some differences between some of the lives shown above and the corresponding lives shown in SB 744 and the FAA AD, however all Australian lives derive directly from the fatigue test program. This amendment is issued to clarify that for spar assemblies P/N 97701, only the upper and lower spar caps need be retired. Amendment 2 of this Airworthiness Directive became effective on 1 September 1982. The original issue of this Airworthiness Directive became effective on 29 November 1974. Bernard Malcolm Hole Delegate of the Civil Aviation Safety Authority 31 May 2000 The above AD is notified in the Commonwealth of Australia Gazette on 14 June 2000. AL 7/2000