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-31/65 Cabin Door Latch - Modification 5/78 Applicability: All models PA-31, PA-31-325 and PA-31-300 with S/Nos. 31-2 to 31-7512029. All model PA-31-350 with S/Nos. 31-5001 to 31-7552052. Except those incorporating three kits denoted in Piper SL 739. Document: Piper SL 803A. Compliance: Unless already accomplished, within 100 hours time in service after 31 May 1978.