COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Fokker F28 Series Aeroplanes AD/F28/17 Main Landing Gear Wheel - Inspection NK Applicability: All models. Requirement: Inspect Goodyear Main Landing Gear wheels in the area of the internal flange radius using either an approved eddy current or ultrasonic technique. Compliance: At each tyre removal after 3 August 1971.