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.
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
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.
Eugene Paul Holzapfel
Delegate of the Civil Aviation Safety Authority 13 September 2001
The above AD is notified in the Commonwealth of Australia Gazette on 10 October 2001.
Overview
The Civil Aviation Regulations 1998 were enacted to establish a comprehensive regulatory framework governing the operation and safety of civil aviation in Australia. The regulations were designed to address the need for stringent safety standards and operational guidelines to mitigate risks associated with air travel. This legislation is administered by the Civil Aviation Safety Authority (CASA), which aims to ensure the highest possible standards of safety and efficiency in Australia's civil aviation sector. The policy objective behind these regulations is to safeguard the public and ensure the safe, efficient, and orderly development of civil aviation. In 2001, an amendment to the Civil Aviation Regulations 1998 was introduced to address specific safety concerns related to electrical equipment in certain aircraft models. This amendment, issued as Airworthiness Directive (AD) AD/ELECT/57, mandates the replacement of specific fan and transducer installations in certain aircraft, such as the BAe 146, to prevent wear-induced malfunctions that could compromise safety. The directive was issued under the authority of the Civil Aviation Safety Authority, aligning with its mandate to enforce airworthiness standards and ensure ongoing safety in civil aviation operations.
Scope and Application
The Civil Aviation Regulations 1998, under the jurisdiction of the Civil Aviation Safety Authority (CASA), mandate the implementation of Airworthiness Directives (AD) to ensure the safety of aviation operations. Specifically, this AD pertains to the replacement of Dunlop Fan and Transducer installations with part numbers AHA1578, AHA1684, and AHA1685, notably on BAe 146 aircraft. The requirement necessitates adherence to Dunlop Limited Aviation Division Service Bulletin 32-1039, with particular attention to Modification C2640 as outlined in SB AHA 1684/AHA1685-32-1047 dated 19 September 1990 for BAe 146 aircraft. This AD also recognises that compliance with these service bulletins has been classified as mandatory by the UK Civil Aviation Authority. Compliance with this directive involves replacing the specified components either before 28 February 1991 or at intervals not exceeding 1500 landings, with operators having positive records of both transducer drive shaft and splined drive replacement allowed to extend the service until 1500 landings from the last replacement. The AD became effective on 1 November 2001, superseding AD AD/ELECT/57, and was notified in the Commonwealth of Australia Gazette on 10 October 2001.
Key Provisions
The Civil Aviation Regulations 1998, particularly Part 39 - 107, establish a schedule of Airworthiness Directives (ADs) that ensure the safety of civil aviation. Specifically, Airworthiness Directive (AD) AD/ELECT/57 has been revoked and replaced with a new AD concerning electrical equipment. This directive, issued under subregulation 39.1(1) of the Civil Aviation Regulations 1998, mandates actions to address unsafe conditions identified in certain aircraft components. The AD in question applies to Dunlop Fan and Transducer Installations with part numbers AHA1578, AHA1684, and AHA1685, specifically those installed in BAe 146 aircraft. The requirement is to replace these installations in accordance with Dunlop Limited Aviation Division Service Bulletin 32-1039. For BAe 146 aircraft, incorporation of Modification C2640 as per Service Bulletin AHA 1684/AHA1685-32-1047 dated 19 September 1990 is considered terminating action for this directive. Compliance with this Service Bulletin has been classified as mandatory by the UK Civil Aviation Authority.
The AD imposes specific obligations on aircraft operators and owners. They must ensure that the fan and transducer installations are replaced or modified as specified in the directive. Operators must adhere to the compliance intervals, which require action either prior to 28 February 1991 or at intervals not exceeding 1500 landings thereafter. Operators with documented records of both transducer drive shaft and splined drive replacements may allow these components to continue in service until they have completed 1500 landings from the last replacement. Failure to comply with these requirements could result in safety hazards, such as the production of false signals by the transducer, which can lead to reduced braking performance or loss of braking.
Failure to comply with the provisions of this Airworthiness Directive may result in severe consequences. Civil Aviation Safety Authority (CASA) may take enforcement action against operators who do not adhere to the mandated safety requirements. Penalties for non-compliance can include fines, operational restrictions, or even grounding of the affected aircraft until the required modifications are made. The severity of the penalties depends on the extent of non-compliance and the potential risk posed to flight safety. The directive highlights the importance of stringent adherence to airworthiness standards to ensure the highest levels of safety in civil aviation.