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 269/48 Amdt 1 Canopy Slat - Inspection and Modification 5/75 Applicability: All models 269A, 269A-1, 269B. Model 269C with S/Nos. 0001 to 0390 fitted with canopy slat P/N 269A2297 or 269A2297-7. Requirement: 1. Visually inspect the canopy slat over its entire length for cracks. Inspect slat attachment hardware and canopy attachment areas for condition and security. Cracked components must be replaced before further flight. 2. Modify the canopy slat, P/N 269A2297 or 269A2297-7, in accordance with Hughes SIN No. N-127. Compliance: 1. At each daily or overnight inspection until incorporation of the modification. 2. Within 50 hours time in service after 30 May 1975.