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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Bell Helicopter Textron Canada (BHTC) 222 Series Helicopters
AD/BELL 222/15 Main Rotor Yoke 7/89
All helicopters fitted with main rotor yoke P/N 222-011-102-101.
Modify yoke assembly in accordance with Bell Alert Service Bulletin 222-88-51.
Prior to issue for Australian Certificate of Airworthiness.
Investigation of a cracked main rotor yoke has determined that the crack resulted from fretting. A yoke assembly modification has been developed that will add a buffer pad under the yoke bushings and replace the existing bushings with a larger flange version. The flapping bearing buffer pads are also replaced with larger diameter pads.