Commonwealth legislation

AD/BELL 47/65 - Duplex Pitch Change Bearing - Inspection and Retirement

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

Applies to Bell Helicopter Textron Model 47 (47D-1, 47G, 47G-2, 47H-1) fitted with duplex pitch change bearing P/N 47-641-131-1. Requires dismantling the tail rotor drive head to inspect the guide sleeve and bearing for scoring/roughness within 100 hours after 31 Aug 1970, and mandates replacement of the bearing at intervals not exceeding 600 hours. Operators bear costs; the rule prevents failure by enforcing inspection and fixed replacement timing.

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AD/BELL 47/65 - Duplex Pitch Change Bearing - Inspection and Retirement

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Bell Helicopter Textron 47 (All Variants) Series Helicopters

AD/BELL 47/65 Duplex Pitch Change Bearing - Inspection

and Retirement

8/70

Applicability: All model 47D-1, 47G, 47G-2 and 47H-1 fitted with duplex pitch change bearing P/N 47-641-131-1.

Requirement: 1. Inspection: Dismantle the tail rotor drive head sufficiently to expose the duplex pitch change bearings and guide sleeve P/N 47-641-040 or 47-641-130.

1.1. Inspect the outside surface of the guide sleeve for scoring.

1.2. Inspect the duplex bearing for roughness.

2. Retirement: Replace duplex pitch change bearings P/N 47-641-131-1.

Note: FAA AD 70-14-1 also refers.

Compliance: For Para. 1 - Within 100 hours time in service after 31 August 1970. For Para. 2 - At intervals not exceeding 600 hours total time in service.

Source text

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

1 AD/BELL 47/65 - Duplex Pitch Change Bearing - Inspection and Retirement