COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Schweizer (Hughes) 269 Series Helicopters AD/HU 269/62 Amdt 1 Tail Rotor Hub - Inspection and Modification 3/82 Applicability: All model 269C with S/Nos. 0004 to 0716. All model 269A, TH-55A, 269A-1 and 269B with LTS tail rotor assembly P/N 269A6034 Series. All P/N 369A1725and 369A1725-501 tail rotor hub assemblies. All P/N 369A1725-5 tail rotor assemblies with S/Nos. 001 to 862. Document: Hughes SIN No. N-153.1. Compliance: Within 100 hours time in service after 31 March, 1982. Background: Manufacturer's SI Notice Revision 1 extends part number effectivity.