Commonwealth legislation

AD/BELL 204/35 - Tail Rotor Gearbox Duplex Bearings

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This Airworthiness Directive requires operators of Bell Model 204B helicopters to remove specified tail‑rotor gearbox duplex bearing sets (listed by part and serial numbers) installed in tail rotor quill P/N 204-040-012-009. Removal must be carried out before any further flight from the AD’s effective date. The stated aim is to prevent tail‑rotor gearbox failure and possible loss of control.

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Current sections

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AIRWORTHINESS DIRECTIVE

View image in the official source

View image in the official source
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

AD/BELL 204/35 Tail Rotor Gearbox Duplex

AD/BELL 204/35 Tail Rotor Gearbox Duplex Bearings 8/2000

Applicability: Model 204B.

Requirement: Remove from service tail rotor gearbox duplex bearing sets P/N 204-040-424-001 with S/Nos 1 to 182, MB183 to MB382, MB442, MB486, MB513, MB518, MB519, MB524, MB530, MB531, MB544, MB545, MB548, MB549, MB551, MB553, MB554, MB561, MB659, MB743, MB744, MB760 to MB769, and MB927 to

MB936 inclusive installed in tail rotor quill P/N 204-040-012-009.

Note: FAA AD 90-01-11 refers.

Compliance: Before further flight after the effective date of this directive.

This Airworthiness Directive becomes effective on 10 August 2000.

Background: This directive is issued to prevent failure of the tail rotor gearbox and subsequent loss of control. It also follows the re-introduction of the AD Series after sixteen years.

View image in the official source

David Alan Villiers

Delegate of the Civil Aviation Safety Authority 6 July 2000

View image in the official source

The above AD is notified in the Commonwealth of Australia Gazette on 12 July 2000.

Source text

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

AIRWORTHINESS DIRECTIVE AIRWORTHINESS DIRECTIVE

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

AD/BELL 204/35 Tail Rotor Gearbox Duplex AD/BELL 204/35 Tail Rotor Gearbox Duplex Bearings 8/2000

AD/BELL 204/35 Tail Rotor Gearbox Duplex Bearings 8/2000

Applicability: Model 204B.

MB936 inclusive installed in tail rotor quill P/N 204-040-012-009.

Note: FAA AD 90-01-11 refers.

Compliance: Before further flight after the effective date of this directive.

This Airworthiness Directive becomes effective on 10 August 2000.

Background: This directive is issued to prevent failure of the tail rotor gearbox and subsequent loss of control. It also follows the re-introduction of the AD Series after sixteen years.

David Alan Villiers

Delegate of the Civil Aviation Safety Authority 6 July 2000

The above AD is notified in the Commonwealth of Australia Gazette on 12 July 2000.