Commonwealth legislation

AD/MAKILA/4 - Electronic Control Unit

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

Requires operators of AS 332 “Super Puma” helicopters fitted with Makila 1A/1A1 engines (already modified by TU 203) to upgrade the engine Electronic Control Unit (ECU) by installing Turbomeca Modification TU 215 in accordance with Service Bulletin SB 298 73 0166.

The change is mandated to address a DGAC finding that existing failure‑detection logic can allow power‑turbine overspeed; compliance was required by 30 June 2002, so affected owners/operators must schedule and pay for the ECU modification.

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Current sections

Direct links to the current provisions in AD/MAKILA/4 - Electronic Control Unit.

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.

Turbomeca Turbine Engines - Makila Series

AD/MAKILA/4 Electronic Control Unit 2/20

AD/MAKILA/4 Electronic Control Unit 2/2002

Applicability: Makila 1A and 1A1 engines, with Electronic Control Unit (ECU) modification TU 203 embodied in accordance with Turbomeca Service Bulletin (SB) 298 73 0146, installed on AS 332 ‘Super Puma’ C, C1, L and L1 helicopters.

Requirement: Modify the ECUs by incorporating Turbomeca Modification TU 215 in accordance with SB 298 73 0166 dated 5 October 2001.

Note: DGAC AD 2001-546(A) refers.

Compliance: Before 30 June 2002.

This Airworthiness Directive becomes effective on 21 February 2002.

Background: Analysis of an accident by the Direction Générale de l’Aviation Civile of France revealed that existing failure detection laws may not prevent the power turbine from overspeeding. This Directive, together with AD/MAKILA/3, introduces modifications to the engine ECU designed to correct this deficiency.

Signature of Eugene Paul Holzapfel Delegate of the Civil Aviation Safety Authority

Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority 14 January 2002

View image in the official source

The above AD is notified in the Commonwealth of Australia Gazette on 30 January 2002.

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.

Turbomeca Turbine Engines - Makila Series

AD/MAKILA/4 Electronic Control Unit 2/20 AD/MAKILA/4 Electronic Control Unit 2/2002

AD/MAKILA/4 Electronic Control Unit 2/2002

Requirement: Modify the ECUs by incorporating Turbomeca Modification TU 215 in accordance with SB 298 73 0166 dated 5 October 2001.

Note: DGAC AD 2001-546(A) refers.

Compliance: Before 30 June 2002.

This Airworthiness Directive becomes effective on 21 February 2002.

Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority 14 January 2002

The above AD is notified in the Commonwealth of Australia Gazette on 30 January 2002.