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 269/19 Amdt 1 Engine Mount Hanger - Inspection 11/67 Applicability: Models 269A and 269B. Requirement: Carry out a visual inspection of the left and right hand engine mount drive end hangar assembly P/No. 269A8617 and 269A8618 for cracking. Note: A light and mirror will be required as an aid to the inspection. Compliance: At intervals not exceeding 60 hours time in service after 19 May 1967.