COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Pilatus Porter PC-6 Series Aeroplanes AD/PC-6/32 Elevator Attachment Bracket - Inspection and Modification 8/71 Applicability: All models. Requirement: 1. Inspect the elevator attachment bracket P/N 6300.0011.00 for evidence of reworking of flange referred to in paras. 1.2 and 1.3 of Pilatus SB No. 107. In the event of positive identification, comply with para. 2 and 3 of this Directive. 2. Inspect the elevator attachment bracket in accordance with para. 2.1 of Pilatus SB No. 107 for evidence of cracking. If cracking is found repair as instructed in Service Bulletin. 3. Reinforce the elevator attachment bracket in accordance with Pilatus SB No. 107. Compliance: For para. 1 - Within 10 hours time in service after 24 August 1971. For para. 2 - Within 10 hours time in service after 24 August 1971 and thereafter at intervals not exceeding 100 hours time in service until the accomplishment of para. 3. For para. 3 - Within 200 hours time in service after 24 August 1971 or before 31 December 1971, whichever occurs first.