Commonwealth legislation

AD/BELL 205/46 - Anti-Torque Control System - Modification to Pushrod Status

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This Airworthiness Directive (AD) is a mandatory safety order issued by the Civil Aviation Safety Authority for Bell 205A-1 helicopters.

What it requires Helicopter owners must modify the anti-torque control system (the mechanism that controls the tail rotor, which prevents the helicopter from spinning uncontrollably) before 31 December 1979.

Why it matters The original design uses a chain to control the tail rotor. Multiple cases have been found where these chain links crack and fail, which could cause the pilot to lose control of the tail rotor and crash. Bell Helicopter has developed a safer replacement using pushrods (solid metal rods) instead of chains.

How to comply Follow the technical instructions in either:

Bell Service Bulletin No. 205-78-5, or
FAA Airworthiness Directive 76-12-07 (revised September 1979)

Who is affected Anyone who owns or operates a Bell 205A-1 helicopter.

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Current sections

Direct links to the current provisions in AD/BELL 205/46 - Anti-Torque Control System - Modification to Pushrod Status.

AD/BELL 205/46 - Anti-Torque Control System - Modification to Pushrod Status

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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 205 Series Helicopters

AD/BELL 205/46 Anti-Torque Control System - Modification

to Pushrod Status

12/79

Applicability: All model 205A-1. Document: 1 Bell SB No. 205-78-5; or

FAA AD 76-12-07, revised September 21, 1979. Compliance: Before 31 December 1979.

Background: Numerous cases have occurred of cracking to tail rotor control chain links. the manufacturer has introduced an alternative control system which utilises pushrods.

Source text

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