Commonwealth legislation

AD/UH-1/16 - Main Rotor Mast P/N 204-011-450-001 & -005

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Jurisdiction

Commonwealth

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legislative instrument

Plain English Summary

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This Airworthiness Directive requires owners/operators of the listed UH‑1, TH‑1 and certain Southwest Florida Aviation helicopters to remove main rotor mast assemblies P/N 204‑011‑450‑001 and P/N 204‑011‑450‑005 and install a serviceable mast that is not one of those two parts. The replacement must be done within 25 hours time in service after 30 August 2000. CASA cites an FAA report of a fatigue failure of a thin‑walled mast as the safety reason. Operators pay for grounding, parts and replacement and must decide how to source compliant masts.

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Direct links to the current provisions in AD/UH-1/16 - Main Rotor Mast P/N 204-011-450-001 & -005.

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/UH-1/16 Main Rotor Mast P/N 204-011-4

AD/UH-1/16 Main Rotor Mast P/N 204-011-450-001 & -005 10/2000

Applicability: Models UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, UH-1P, and HH-1K, TH-

1F, TH-1L, and Southwest Florida Aviation SW204, SW204HP, SW205, and SW205A-1 helicopters with a main rotor mast assembly part number 204-011-450- 001 or -005 installed.

Requirement: Remove the main rotor mast assembly from service. Replace with a serviceable mast assembly that is neither a 204-011-450-001 nor a -005.

Note: FAA AD 2000-15-21 refers.

Compliance: Within 25 hours time in service after 30 August 2000.

This Airworthiness Directive becomes effective on 30 August 2000.

Background: The FAA received a report of a BHTI-manufactured Model UH-1B accident that was attributed to fatigue failure of a thin-walled mast installed on the helicopter.

Signature of Steve Swift Delegate of the Civil Aviation Safety Authority

Steve Swift

Delegate of the Civil Aviation Safety Authority 24 August 2000

View image in the official source

The above AD is notified in the Commonwealth of Australia Gazette on 30 August 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/UH-1/16 Main Rotor Mast P/N 204-011-4 AD/UH-1/16 Main Rotor Mast P/N 204-011-450-001 & -005 10/2000

AD/UH-1/16 Main Rotor Mast P/N 204-011-450-001 & -005 10/2000

Applicability: Models UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, UH-1P, and HH-1K, TH-

1F, TH-1L, and Southwest Florida Aviation SW204, SW204HP, SW205, and SW205A-1 helicopters with a main rotor mast assembly part number 204-011-450- 001 or -005 installed.

Requirement: Remove the main rotor mast assembly from service. Replace with a serviceable mast assembly that is neither a 204-011-450-001 nor a -005.

Note: FAA AD 2000-15-21 refers.

Compliance: Within 25 hours time in service after 30 August 2000.

This Airworthiness Directive becomes effective on 30 August 2000.

Background: The FAA received a report of a BHTI-manufactured Model UH-1B accident that was attributed to fatigue failure of a thin-walled mast installed on the helicopter.

Steve Swift

Delegate of the Civil Aviation Safety Authority 24 August 2000

The above AD is notified in the Commonwealth of Australia Gazette on 30 August 2000.