Document ID: chunk:federal_register_of_legislation:F2006B04607:body:0
Version: federal_register_of_legislation:F2006B04607
Segment Type: other
Provision Reference: 
Character Range: 0–873

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

 Applicability: All helicopters fitted with main rotor yoke P/N 222-011-102-101.

 Requirement: Modify yoke assembly in accordance with Bell Alert Service Bulletin 222-88-51. Compliance:               Prior to issue for Australian Certificate of Airworthiness.
            Background:  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.