COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Pratt and Whitney Canada Turbine Engines - PT6T Series AD/PT6T/5 P3 Air Filter 10/85 Applicability: PT6T-3, -3B, -6 and ST6T-75, -76 with S/Nos. as per SB No. 5206, Rev. 3. Document: 1. Pratt & Whitney Aircraft of Canada SB No. 5124, Rev. 5; and 2. Pratt & Whitney Aircraft of Canada SB No. 5180, Rev. 2; or 3. Pratt & Whitney Aircraft of Canada SB No. 5206, Rev. 3; or 4. AD/UAC-T/33 Amdt 3. Note: Canadian Airworthiness Directive No. CF-83-04 refers. Compliance: Not later than next overhaul. Background: This Directive is amended in order to specify Service Bulletin No. 5206, Rev. 3 as an alternative means of compliance and to reference the Canadian Airworthiness Directive concerned.