Commonwealth legislation

AD/BELL 222/15 - Main Rotor Yoke

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

Requires a one-off modification of the Bell 222 main rotor yoke (P/N 222-011-102-101) in line with Bell Alert Service Bulletin 222-88-51, to be completed before an Australian Certificate of Airworthiness is issued. The change — adding buffer pads and larger-flange bushings and flapping-bearing pads — responds to a fretting-related crack; owners/operators must arrange and pay for the work and schedule it to obtain the certificate.

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Current sections

Direct links to the current provisions in AD/BELL 222/15 - Main Rotor Yoke.

AD/BELL 222/15 - Main Rotor Yoke

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source 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.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.