COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 188 (Agwagon) Series Aeroplanes AD/CESSNA 188/3 Amdt 1 Main Undercarriage Legs 2/69 Applicability: All models not fitted with spring leg P/No. 1641007. Requirement: Inspect the main undercarriage spring legs for cracking in the vicinity of the bend adjacent to fuselage attachment points using the magnetic particle method. Compliance: At intervals not exceeding 300 hours time in service.