COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Piper PA-24 (Comanche) Series Aeroplanes AD/PA-24/38 Aileron Spar - Inspection and Modification 2/77 Applicability: All models PA-24, PA-24-250, PA-24-260 and PA-24-400 with S/Nos. 24-1 to 24- 5047 and 26-2 to 26-148 not incorporating Piper Kit No. 760914. Document: Piper SL No. 787. Compliance: Inspection within 100 hours time in service after 28 February 1977 and thereafter at intervals not exceeding 100 hours time in service until modified.