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 369/67 Amdt 1 Applicability: All models. Main Rotor Retention Strap 4/88 Requirement: Action in accordance with Part 1 of McDonnell Douglas SIN HN214, DN154, EN44 or FN33 as applicable. Compliance: As applicable by helicopter model, either: (a) within three months or one hundred hours time in service after the previous compliance with AD/HU 369/28D whichever occurs first; or (b) within nine months or three hundred hours time in service after the previous compliance with the initial issue of this Directive whichever occurs first; (c) and thereafter in accordance with the Requirement document. Background: The manufacturer has consolidated the inspection within the single SIN.