COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes
AD/DHC-8/25 Power Cable Connectors 1/93 TX
Applicability: All DHC-8 100 & 300 Series without modification 8/1970 incorporated.
Requirement: Action in accordance with de Havilland Inc Service Bulletin No A8-24-44 dated 23 October 1992, or later approved versions.
Note: Canadian Emergency AD CF-92-20 refers.
Compliance: Prior to 9 January 1993.
Background: This action is required because electrical DC feeder cables are loosening and corroding. The cause is attributed to the use of aluminium washers.
Overview
The Civil Aviation Regulations 1998, administered by the Civil Aviation Safety Authority (CASA), contain provisions to ensure the safety of civil aviation in Australia. Among these regulations, Part 39 - 105 addresses Airworthiness Directives, which are enforceable rules that must be followed to ensure the continued safe operation of aircraft. One such directive, AD/DHC-8/25, pertains specifically to Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes, addressing the critical issue of power cable connectors. This directive was introduced to mitigate the risk of electrical DC feeder cables loosening and corroding, a problem linked to the use of aluminium washers. Compliance with this directive is mandatory for all DHC-8 100 & 300 Series aeroplanes without modification 8/1970 incorporated, and it requires adherence to de Havilland Inc Service Bulletin No A8-24-44 dated 23 October 1992, or later approved versions, to be effective before 9 January 1993. The policy objective is to enhance aviation safety by ensuring that all necessary measures are taken to prevent potential electrical failures that could compromise the safety of flight operations.
Scope and Application
The Civil Aviation Regulations 1998, specifically PART 39 - 105, mandate the implementation of Airworthiness Directives for certain aircraft models, including the Bombardier (Boeing Canada/De Havilland) DHC-8 Series aeroplanes. This directive, identified as AD/DHC-8/25, applies to all DHC-8 100 and 300 Series aeroplanes that have not incorporated modification 8/1970. The regulation requires compliance with de Havilland Inc Service Bulletin No A8-24-44 dated 23 October 1992 or any later approved versions, as referenced in the Canadian Emergency AD CF-92-20. The directive is essential to address the issue of electrical DC feeder cables loosening and corroding due to the use of aluminium washers, necessitating corrective action before 9 January 1993. This directive is a Commonwealth regulation, applying nationally across Australia, ensuring that all affected aircraft conform to the specified safety standards to maintain airworthiness.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 105, under the Civil Aviation Safety Authority (CASA) schedule of Airworthiness Directives, outlines key requirements for Bombardier (Boeing Canada/De Havilland) DHC-8 Series aeroplanes. One such directive, AD/DHC-8/25, pertains to power cable connectors and is applicable to all DHC-8 100 and 300 Series aeroplanes without modification 8/1970 incorporated. According to this directive (Section 1), operators must take action in accordance with de Havilland Inc Service Bulletin No A8-24-44 dated 23 October 1992, or any later approved versions. It is noteworthy that Canadian Emergency AD CF-92-20 also refers to this issue.
Operators of the affected aircraft must adhere to specific obligations outlined in the directive. They are required to ensure that all actions are carried out in compliance with the prescribed service bulletin or any subsequent approved versions (Section 2). This involves addressing the issue of electrical DC feeder cables that are prone to loosening and corroding, a problem that arises from the use of aluminium washers. To meet these requirements, operators must complete the necessary actions before 9 January 1993, as stipulated in the directive (Section 3).
Failure to comply with the requirements set forth in the Airworthiness Directive can lead to serious consequences. The Civil Aviation Regulations 1998 impose obligations on operators to ensure that the specified actions are taken in a timely manner. Non-compliance with these obligations can result in civil or criminal penalties. The regulations do not explicitly state the maximum penalties for breach, but operators should be aware that CASA has the authority to enforce compliance through various means, including fines, suspension, or revocation of airworthiness certificates. Operators are thus required to take the directive seriously and ensure full compliance to avoid any potential penalties or legal repercussions.