Commonwealth legislation

AD/ELECT/57 Amdt 1 - Landing Gear - Dunlop Fan and Transducer Installation

In ForceCTH

Jurisdiction

Commonwealth

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legislative instrument

Plain English Summary

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This Airworthiness Directive requires operators to replace specified Dunlop landing-gear fan and transducer assemblies (P/Ns AHA1578, AHA1684, AHA1685) in accordance with Dunlop Service Bulletin 32‑1039 and to meet the existing 1,500‑landing inspection/replacement interval. It affects aircraft fitted with those parts (including BAe 146) because wear in the transducer drive splines can create false skid signals and reduce braking. The amendment adds a terminating modification (C2640) for BAe 146 when embodied per Dunlop SB AHA1684/AHA1685‑32‑1047.

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Direct links to the current provisions in AD/ELECT/57 Amdt 1 - Landing Gear - Dunlop Fan and Transducer Installation.

AD/ELECT/57 Amdt 1 - Landing Gear - Dunlop Fan and Transducer Installation

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
View image in the official source
Electrical Equipment

AIRWORTHINESS DIRECTIVE

View image in the official source

View image in the official sourceFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/ELECT/57 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.

Applicability: Dunlop Fan and Transducer Installation Part Numbers AHA1578, AHA1684 AND AHA1685.

View image in the official sourceNote 1: Aircraft known to be fitted with these Fan and Transducer installations include but are not limited to BAe 146 aircraft.

Requirement: Replace the fan and transducer installation in accordance with Dunlop Limited Aviation Division Service Bulletin (SB) 32-1039.

View image in the official sourceNote 2: Incorporation of Modification C2640 in accordance with Dunlop Limited Aviation Division SB AHA 1684/AHA1685-32-1047 dated 19 September 1990 in BAe 146 aircraft is considered terminating action for this Directive for those aircraft.

Note 3: Compliance with this Service Bulletin has been classified mandatory by the UK CAA.

Compliance: Remains unchanged as - “Initially, prior to 28 February 1991, and thereafter at intervals not exceeding 1500 landings. Operators with positive records of both transducer drive shaft and splined drive replacement may allow these components to continue in service until they have completed 1500 landings from the last replacement.”

This Amendment becomes effective on 1 November 2001.

Background: Wear in the transducer drive splines can cause the transducer to produce false signals. These signals may be interpreted as skids by the anti skid control box, and may result in reduced braking performance or loss of braking.

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official sourceThis amendment introduces terminating action for BAe 146 aircraft and minor formatting amendments. The original issue of this Directive became effective on 29 November 1990.

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

Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority 13 September 2001

View image in the official source

The above AD is notified in the Commonwealth of Australia Gazette on 10 October 2001.

Source text

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

1 AD/ELECT/57 Amdt 1 - Landing Gear - Dunlop Fan and Transducer Installation

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Electrical Equipment

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/ELECT/57 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.

Applicability: Dunlop Fan and Transducer Installation Part Numbers AHA1578, AHA1684 AND AHA1685.

Note 1: Aircraft known to be fitted with these Fan and Transducer installations include but are not limited to BAe 146 aircraft.

Requirement: Replace the fan and transducer installation in accordance with Dunlop Limited Aviation Division Service Bulletin (SB) 32-1039.

Note 2: Incorporation of Modification C2640 in accordance with Dunlop Limited Aviation Division SB AHA 1684/AHA1685-32-1047 dated 19 September 1990 in BAe 146 aircraft is considered terminating action for this Directive for those aircraft.

Note 3: Compliance with this Service Bulletin has been classified mandatory by the UK CAA.

This Amendment becomes effective on 1 November 2001.

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

This amendment introduces terminating action for BAe 146 aircraft and minor formatting amendments. The original issue of this Directive became effective on 29 November 1990.