COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 177 Series Aeroplanes AD/CESSNA 177/11 Amdt 1 Stabilator Attachment Angles 4/72 Applicability: Model 177 with S/Nos. 17700001 to 17701164 and Model 177A with S/Nos. 17701165 to 17701370 not fitted with Cessna Kit No. SK 177-11 (Ref. Cessna SB SE70-32). Requirement: 1. Remove the fuselage tail stinger and inspect the stabilator attachment angles P/No. 1712108 for cracking using a dye- penetrant method. 2. Modify the stabilator attachments by fitting Cessna Kit No. SK 177-11. Compliance: For para. 1 - Within 50 hours time in service after 29 January 1971 and thereafter at intervals not exceeding 50 hours time in service. For para. 2 - Within 100 hours time in service after 28 April 1972.