COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety 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 CASR 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-8/93 APU Fuel Line Chafing 11/2003
Applicability: DHC-8 Series 100, 200 and 300 aeroplanes, serial numbers 003 to 585 inclusive, with Auxiliary Power Unit (APU) installation per Standard Option Only (S.O.O.) 8155 or Change Request (CR) 849SO08155.
Requirement: Carry out the inspection and rectification (if required) of the APU fuel tube assembly, Part Number (P/N) 82830105-139, in accordance with Bombardier Service Bulletin (SB) 8-49-19, dated 13 May 2003, or SB 8-49-19, Revision A, dated 7 July 2003.
Note: Transport Canada AD CF-2003-22 refers.
Compliance: With six months from the effective date of this Directive.
This Airworthiness Directive becomes effective on 30 October 2003.
Background: Investigation of a fuel leak incident revealed chafing of the APU fuel tube assembly on the bleed air duct shroud located in the centre wing area. The APU fuel tube assembly is attached to a fairlead by two clamps. In some instances, incorrect installation of the clamps on the fairleads may result in insufficient clearance, and cause contact between the fuel line and the bleed air duct, or gust lock cable, resulting in chafing of the APU fuel tube. The intent of this Directive is to provide inspection instructions and corrective actions to ensure the integrity of the APU fuel tube.
Jim Coyne
Delegate of the Civil Aviation Safety Authority 18 September 2003
The above AD is notified in the Commonwealth of Australia Gazette on 8 October 2003.
Overview
The Civil Aviation Safety Regulations 1998 (CASR 1998), enacted by the Australian Parliament, provide a comprehensive framework for ensuring the safety of civil aviation in Australia. This legislation aims to address potential safety risks associated with aircraft operations and maintenance by requiring the implementation of Airworthiness Directives (ADs) where necessary. These ADs are issued by the Civil Aviation Safety Authority (CASA) to mandate corrective actions in response to identified safety concerns. The AD discussed here, AD/DHC-8/93, specifically targets Bombardier (Boeing Canada/De Havilland) DHC-8 Series aeroplanes to rectify a chafing issue in the Auxiliary Power Unit (APU) fuel line. The objective of this directive is to ensure the continued airworthiness and safety of these aircraft by requiring inspections and necessary rectifications to prevent potential fuel leaks and associated hazards.
Scope and Application
This Airworthiness Directive issued under the Civil Aviation Safety Regulations 1998 pertains specifically to Bombardier (Boeing Canada/De Havilland) DHC-8 Series aeroplanes, namely the 100, 200 and 300 models with certain serial numbers and APU installation configurations. The directive mandates the inspection and potential rectification of the APU fuel tube assembly, as specified in Bombardier's Service Bulletins 8-49-19 and its revision. This directive applies to aircraft operators and maintenance personnel who must comply within six months from its effective date of 30 October 2003. The directive is aimed at addressing an identified safety issue concerning chafing of the APU fuel tube assembly due to insufficient clearance caused by incorrectly installed clamps. The directive is a Commonwealth measure, enforced by the Civil Aviation Safety Authority, and it extends its application to all relevant aircraft within the jurisdiction of Australia, aligning with international standards as evidenced by the reference to a similar Transport Canada AD.
Key Provisions
The Civil Aviation Safety Regulations 1998, under Part 39, specifically address Airworthiness Directives (ADs) which are crucial for ensuring the safe operation of aircraft. The Airworthiness Directive for the Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes, identified as AD/DHC-8/93, pertains to a specific issue concerning the APU (Auxiliary Power Unit) fuel line chafing. This AD applies to DHC-8 Series 100, 200, and 300 aeroplanes with certain serial numbers and APU installations, specifically those per Standard Option Only (S.O.O.) 8155 or Change Request (CR) 849SO08155 (section 11/2003).
Under the requirements section, the directive mandates that an inspection and possible rectification of the APU fuel tube assembly, Part Number (P/N) 82830105-139, be carried out. This must be performed in accordance with Bombardier Service Bulletin (SB) 8-49-19, dated 13 May 2003, or its revision dated 7 July 2003 (section requirement). Compliance with these directives must be achieved within six months from the effective date of the AD, which is 30 October 2003 (section compliance). The directive aims to address a previously identified issue of chafing of the APU fuel tube due to insufficient clearance, caused by the incorrect installation of clamps on the fairleads.
Entities and operators governed by this AD must ensure that the specified inspections and corrective actions are performed on the relevant aircraft. This involves meticulous adherence to the Bombardier Service Bulletin instructions to maintain the integrity of the APU fuel tube. Failure to comply with these directives could result in the aircraft being deemed unairworthy, which would prevent its operation until the required actions are satisfactorily completed.
In terms of consequences, any breach of the AD's provisions could lead to severe penalties. The Civil Aviation Safety Authority (CASA) has the authority to enforce compliance, and non-compliance could result in both civil and criminal penalties. Although the exact penalties are not specified in the text, they may include fines and potential criminal charges for operators who fail to adhere to the AD. This underscores the importance of strict compliance to avoid legal repercussions and ensure the continued airworthiness of the aircraft.