COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Cessna 170, 172, F172, FR172 and 175 Series Aeroplanes
AD/CESSNA 170/21 Control Systems 5/70
Applicability: All models with S/Nos 17258161 to 17258844, F1720640 to F1720687, FR1720108 to FR1720175.
Requirement: Action in accordance with Cessna SL SE 69-28. Compliance: Within 100 hours time in service after 29 April 1970.