Commonwealth legislation

AD/DHC-8/83 - Mode S Transponder Wiring

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Commonwealth

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legislative instrument

Plain English Summary

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This Airworthiness Directive requires operators of Bombardier (de Havilland) DHC‑8 series 100, 200 and 300 aeroplanes (serial numbers 003–559) to install two wiring modifications (ModSum 8Q100769 and ModSum 8Q101094) using Bombardier service bulletins. CASA requires the work be done within six months to prevent wire chafing that could cause incorrect Mode S altitude reporting and loss of TCAS alerts. Aircraft owners/operators must arrange and pay for the mandated maintenance, following the approved manufacturer instructions.

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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.

Bombardier (Boeing Canada/de Havilland) DHC-8 Series Aeroplanes

AD/DHC-8/83 Mode S Transponder Wiring 12

AD/DHC-8/83 Mode S Transponder Wiring 12/2001

Applicability: DHC-8 series 100, 200 and 300 aeroplanes, serial numbers 003 through 559. Requirement: Unless already accomplished, install ModSum 8Q100769 and ModSum 8Q101094.

Bombardier Service Bulletin (SB) 8-34-200 dated 26 June 2001 provides approved instructions for installing ModSum 8Q100769.

Bombardier SB 8-30-36 dated 13 July 2000 provides approved instructions for installing ModSum 8Q101094.

Note: Transport Canada AD CF-2001-38 refers.

Compliance: Within 6 months after the effective date of this Directive.

This Airworthiness Directive becomes effective on 29 November 2001.

Background: An investigation of two reports identified wire bundle chafing on the No 2 propeller de-ice timer. The chafing could lead to incorrect altitude information transmitted by the Mode S transponder and simultaneous loss of the Traffic Alert and Collision Avoidance System. This Directive introduces measures designed to prevent the chafing occurring.

View image in the official source

Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority 19 October 2001

View image in the official source

The above AD is notified in the Commonwealth of Australia Gazette on 7 November 2001.

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.

Bombardier (Boeing Canada/de Havilland) DHC-8 Series Aeroplanes

AD/DHC-8/83 Mode S Transponder Wiring 12 AD/DHC-8/83 Mode S Transponder Wiring 12/2001

AD/DHC-8/83 Mode S Transponder Wiring 12/2001

Applicability: DHC-8 series 100, 200 and 300 aeroplanes, serial numbers 003 through 559. Requirement: Unless already accomplished, install ModSum 8Q100769 and ModSum 8Q101094.

Bombardier Service Bulletin (SB) 8-34-200 dated 26 June 2001 provides approved instructions for installing ModSum 8Q100769.

Bombardier SB 8-30-36 dated 13 July 2000 provides approved instructions for installing ModSum 8Q101094.

Note: Transport Canada AD CF-2001-38 refers.

Compliance: Within 6 months after the effective date of this Directive.

This Airworthiness Directive becomes effective on 29 November 2001.

Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority 19 October 2001

The above AD is notified in the Commonwealth of Australia Gazette on 7 November 2001.