COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Piper PA-38 (Tomahawk) Series Aeroplanes AD/PA-38/6 Rear Spar Attach Fittings - Inspection 11/78 Applicability: All model PA-38-112 with S/Nos. as referenced in SB No. 618. Document: Piper SB No. 618. Compliance: Within 10 hours time in service after 6 October 1978.