Commonwealth legislation

AD/ARRIEL/7 Amdt 1 - Module 5 Intermediate Pinion

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Commonwealth

Collection

legislative instrument

Plain English Summary

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This directive requires operators of certain Turbomeca Arriel 1A/1A1/1B/1D/1D1 engines to inspect the reduction-gearbox (module 5) magnetic plug at least every 8 engine hours or daily, and to replace the module 5 gearbox in specified models before further flight. It applies to engines lacking particular factory modifications (TU 232, and in some cases TU 39) to reduce the risk of intermediate pinion failure and potential turbine overspeed; operators must follow the cited Maintenance Manual pages and bear inspection and replacement costs.

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Current sections

Direct links to the current provisions in AD/ARRIEL/7 Amdt 1 - Module 5 Intermediate Pinion.

AD/ARRIEL/7 Amdt 1 - Module 5 Intermediate Pinion

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
View image in the official source
Turbomeca Turbine Engines - Arriel Series

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 revokes Airworthiness Directive (AD) AD/ARRIEL/7 and issues the following 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/ARRIEL/7

Amdt 1

Module 5 Intermediate Pinion 10/2001

Applicability: Arriel 1A, 1A1, 1B, 1D and 1D1 engines.

Requirement: 1. Arriel 1B, 1D, 1D1 engines not incorporating modification TU 232 and Arriel 1A and 1A1 engines incorporating modification TU 13 but not incorporating modification TU 232;

Inspect reduction gearbox (module 5) magnetic plug for evidence of contamination, in accordance with Maintenance Manual chapter 72-80-01, pages 104 and 105.

Arriel 1A, 1A1 incorporating modification TU 13 but not incorporating modification TU 39 and Arriel 1B engine not incorporating modification TU 39;

Replace the reduction gearbox (module 5).

Note 1: DGAC AD 92-078(B) refers. Note 2: DGAC AD 92-078(B) refers.

Compliance: 1. At intervals not to exceed 8 hours engine time in service or daily, whichever occurs first.

Prior to further flight.

This amendment becomes effective on 4 October 2001.

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official sourceBackground: This Directive was originally issued to require repetitive inspection of the reduction gearbox magnetic plug and to remove from service, reduction gearboxes not incorporating a modified intermediate pinion. Unmodified gearboxes are more prone to intermediate pinion gear failure that may result in a possible turbine overspeed.

This amendment clarifies engine models applicable and amends the compliance intervals to reflect that detailed in the applicable Turbomeca service bulletin and DGAC airworthiness directive.

The original issue of this Airworthiness Directive became effective on 25 June 1992.

View image in the official source

Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority 13 August 2001

View image in the official source

The above AD is notified in the Commonwealth of Australia Gazette on 12 September 2001.

Source text

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

1 AD/ARRIEL/7 Amdt 1 - Module 5 Intermediate Pinion

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Turbomeca Turbine Engines - Arriel Series

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/ARRIEL/7 and issues the following 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/ARRIEL/7

Amdt 1

Module 5 Intermediate Pinion 10/2001

Applicability: Arriel 1A, 1A1, 1B, 1D and 1D1 engines.

Requirement: 1. Arriel 1B, 1D, 1D1 engines not incorporating modification TU 232 and Arriel 1A and 1A1 engines incorporating modification TU 13 but not incorporating modification TU 232;

Inspect reduction gearbox (module 5) magnetic plug for evidence of contamination, in accordance with Maintenance Manual chapter 72-80-01, pages 104 and 105.

Arriel 1A, 1A1 incorporating modification TU 13 but not incorporating modification TU 39 and Arriel 1B engine not incorporating modification TU 39;

Replace the reduction gearbox (module 5).

Note 1: DGAC AD 92-078(B) refers. Note 2: DGAC AD 92-078(B) refers.

Compliance: 1. At intervals not to exceed 8 hours engine time in service or daily, whichever occurs first.

Prior to further flight.

This amendment becomes effective on 4 October 2001.

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Background: This Directive was originally issued to require repetitive inspection of the reduction gearbox magnetic plug and to remove from service, reduction gearboxes not incorporating a modified intermediate pinion. Unmodified gearboxes are more prone to intermediate pinion gear failure that may result in a possible turbine overspeed.