COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
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 12/2001
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.
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.
Overview
The Civil Aviation Regulations 1998, specifically under Part 39, includes Airworthiness Directives issued to ensure the safety of aircraft operations. One such directive, AD/DHC-8/83, was enacted in 2001 to address an identified unsafe condition in Bombardier (Boeing Canada/de Havilland) DHC-8 Series aeroplanes. This directive was introduced in response to reports of wire bundle chafing on the No 2 propeller de-ice timer of DHC-8 series 100, 200, and 300 aeroplanes with serial numbers ranging from 003 through 559. The chafing could potentially result in incorrect altitude information being transmitted by the Mode S transponder and a loss of the Traffic Alert and Collision Avoidance System. The Civil Aviation Safety Authority (CASA) delegate issued this directive to mandate the installation of specific modifications, ModSum 8Q100769 and ModSum 8Q101094, as outlined in Bombardier Service Bulletins 8-34-200 and 8-30-36, respectively. The directive requires compliance within six months of its effective date of 29 November 2001, aiming to prevent the identified unsafe condition and ensure the continued airworthiness of the affected aircraft.
Scope and Application
This legislative instrument, the Airworthiness Directive issued under the Civil Aviation Regulations 1998, applies to all DHC-8 series 100, 200, and 300 aeroplanes with serial numbers ranging from 003 to 559. This requirement mandates the installation of specific modifications, namely ModSum 8Q100769 and ModSum 8Q101094, unless they have already been completed. The directive is issued by a delegate of the Civil Aviation Safety Authority (CASA) and is designed to address an identified safety issue related to wire bundle chafing on the No 2 propeller de-ice timer, which could lead to incorrect altitude information and loss of the Traffic Alert and Collision Avoidance System. Compliance with this directive must be achieved within six months of its effective date, which is 29 November 2001. This AD is applicable within the Commonwealth of Australia and is published in the Commonwealth of Australia Gazette on 7 November 2001.
Key Provisions
This Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority (CASA) pertains specifically to the Bombardier (Boeing Canada/de Havilland) DHC-8 Series Aeroplanes, covering serial numbers 003 through 559 of the 100, 200, and 300 variants. The directive mandates the installation of specific modifications to the Mode S transponder wiring to address identified safety concerns. These modifications, detailed in Bombardier Service Bulletins 8-34-200 dated 26 June 2001 and 8-30-36 dated 13 July 2000, are essential to prevent wire bundle chafing on the No 2 propeller de-ice timer. Such chafing could result in the transmission of incorrect altitude information by the Mode S transponder and a simultaneous loss of the Traffic Alert and Collision Avoidance System, posing significant safety risks.
The obligations imposed by this AD require aircraft operators or owners to ensure that the specified modifications are installed within six months from the effective date of the directive, which is 29 November 2001. The installation must be carried out in accordance with the instructions provided in the referenced Bombardier Service Bulletins. Failure to comply with this directive not only risks the safety of the aircraft but also potentially exposes operators and owners to non-compliance penalties as outlined in the Civil Aviation Regulations 1998.
Failure to adhere to the requirements of this AD can result in serious consequences. While specific offences and penalties are not detailed within the AD itself, non-compliance with CASA directives can lead to enforcement actions under the Civil Aviation Act 1988 and associated regulations. Such actions may include fines, suspension or revocation of airworthiness certificates, and other regulatory penalties. Operators and owners must ensure that the mandated modifications are completed within the specified timeframe to avoid these potential consequences and maintain the airworthiness of their aircraft.