COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters AD/HU 369/15 Tail Rotor Blades - Inspection 5/75 Applicability: All 369 series with 369A1613 - basic or -3 metal tail rotor blades with S/Nos. prior to 1310. Document: Hughes SIN No. HN-83. Compliance: For Part 1 - Within 50 hours time in service after 2 May 1975. For Part 2 - Before 2 May 1975. For Part 3 - At each daily inspection. Note: For aircraft maintained in accordance with ANO 100.5.1 Part 3 of this Directive shall be entered on the maintenance release as maintenance required. The Part 3 inspection may be performed by the pilot in command, in which case certification is not required. In all other cases certification may be made on the maintenance release. This inspection may also be performed and certified by any Licensed Aircraft Maintenance Engineer.