COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Piper PA-31 Series Aeroplanes AD/PA-31/7 Elevator Control System - Inspection 5/69 Applicability: All models with S/Nos. 31-2 to 31-326; 31-328 to 31-332 and 31-334. Document: Piper SB No. 289. Compliance: Within 100 hours time in service after 12 May 1969.