Commonwealth legislation

AD/ALF/18 - Turbine Component Life Limits

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This Airworthiness Directive requires operators of Honeywell ALF502 and LF507 engines to remove specified first rotor sealing plates, first turbine rotor discs and turbine spacers in line with FAA AD 2002-12-08; it takes effect 5 September 2002. (Applicability; Requirement; Compliance)

The CASA delegate issues the requirement and operators bear the cost and operational timing of removals and replacements under a mandated life‑limit draw‑down because field analysis found lower low‑cycle fatigue limits for some turbine hardware. (Background; Requirement)

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AIRWORTHINESS DIRECTIVE

View image in the official source

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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.

Allied Signal (Lycoming) Turbine Engines - ALF502 and LF507 Series

AD/ALF/18 Turbine Component Life Limits

AD/ALF/18 Turbine Component Life Limits 9/2002

Applicability: Honeywell ALF502 and LF507 Series engines identified in the requirement document.

Requirement: Remove from service, First Rotor Sealing Plates, First Turbine Rotor Disc and Turbine Spacer per the requirements of FAA AD 2002-12-08.

Note: FAA AD 2002-12-08, Amdt 39-12780 refers.

Compliance: As detailed in the requirement document with a revised effective date of 5 September 2002.

This Airworthiness Directive becomes effective on 5 September 2002.

Background: On-going analysis of field returned hardware has indicated that the low cycle fatigue limits of the turbine hardware are lower than that estimated initially. Hence a lower life limit and a draw down schedule are mandated per this Directive for some turbine hardware.

View image in the official source

Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority 29 July 2002

View image in the official source

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.

Allied Signal (Lycoming) Turbine Engines - ALF502 and LF507 Series

AD/ALF/18 Turbine Component Life Limits AD/ALF/18 Turbine Component Life Limits 9/2002

AD/ALF/18 Turbine Component Life Limits 9/2002

Applicability: Honeywell ALF502 and LF507 Series engines identified in the requirement document.

Requirement: Remove from service, First Rotor Sealing Plates, First Turbine Rotor Disc and Turbine Spacer per the requirements of FAA AD 2002-12-08.

Note: FAA AD 2002-12-08, Amdt 39-12780 refers.

Compliance: As detailed in the requirement document with a revised effective date of 5 September 2002.

This Airworthiness Directive becomes effective on 5 September 2002.

Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority 29 July 2002