COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
AlliedSignal (Lycoming) Turbine Engines - ALF502 and LF507 Series
AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/ALF/16 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: ALF502R series engines.
Requirement: Incorporate fan core inlet anti-ice system modifications in accordance with AlliedSignal Service Bulletin ALF/LF 72-1020, Revision 3, dated 19 January 2001.
Note 1: Compliance with SB ALF/LF 72-1020, Revision 2, dated 30 September 1998, satisfies the intent of this amendment to the AD.
Note 2: FAA AD 99-15-06 refers.
Note 3: AD/BAe146/75 addresses the requirements when installing modified engines on BAe 146 series aircraft.
Compliance: During any shop visit for scheduled hot section inspection, not to exceed 10,000 cycles in service after the effective date of this airworthiness directive, but no later than 31 December 2003.
This Amendment becomes effective on 12 July 2001.
Background: ALF502 engines installed on BAe146 aircraft are prone to a phenomenon known as “rollback” which is an uncommanded power reduction condition and loss of thrust control in certain icing conditions. There have been instances where simultaneous rollback occurred on multiple engines on the same aircraft.
This amendment references Revision 3 of SB ALF/LF 72-1020 that updates procedures and parts in universal Installation Kit, Part No. 2-203-930-05, detail part numbers.
The original issue of this Airworthiness Directive became effective on 4 November 1999.
Eugene Paul Holzapfel
Delegate of the Civil Aviation Safety Authority
1 June 2001
The above AD is notified in the Commonwealth of Australia Gazette on 13 June 2001.
Overview
The Civil Aviation Regulations 1998, specifically PART 39 - 106, address the safety and maintenance of aircraft and aeronautical products in Australia. This legislation was enacted to ensure that all civil aviation activities within the country adhere to stringent safety standards, thereby safeguarding the public and enhancing the efficiency of the aviation industry. The problem or gap this regulation aims to address includes the need for clear and enforceable standards to manage airworthiness directives, ensuring that aircraft remain in a safe condition throughout their operational life. The Civil Aviation Safety Authority (CASA) is the body responsible for enacting these regulations, with a policy objective to maintain and improve the safety of civil aviation through effective regulation and oversight. This approach ensures that any potential risks to aircraft safety are mitigated through timely and precise airworthiness directives, as exemplified by the recent update regarding the AlliedSignal (Lycoming) Turbine Engines - ALF502 and LF507 Series.
Scope and Application
The Airworthiness Directive issued by the Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998 applies specifically to the ALF502R series engines used in aircraft. This directive mandates that modifications to the fan core inlet anti-ice system must be incorporated, in accordance with AlliedSignal Service Bulletin ALF/LF 72-1020, Revision 3. The directive is intended to address the safety issue of “rollback,” an uncommanded power reduction condition that can lead to loss of thrust control in certain icing conditions. Compliance with this directive is required during any shop visit for scheduled hot section inspection, with a timeframe of no more than 10,000 cycles in service after the effective date, but no later than 31 December 2003. The directive also references previous revisions and other related airworthiness directives to ensure comprehensive safety measures are in place, and it extends to any aircraft equipped with the specified engines. The applicability of this directive is national, as it is issued under Commonwealth regulations.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39, includes an Airworthiness Directive (AD) concerning AlliedSignal (Lycoming) Turbine Engines models ALF502 and LF507 Series. This directive, issued under subregulation 39.1 (1) of CAR 1998, mandates specific actions to address identified safety issues. Section (a) specifies the circumstances under which the directive applies, (b) outlines the required actions according to the directive, and (c) sets the timeframe for compliance as mentioned in the compliance section.
This AD applies to ALF502R series engines and requires the incorporation of fan core inlet anti-ice system modifications as per AlliedSignal Service Bulletin ALF/LF 72-1020, Revision 3, dated 19 January 2001. Note 1 clarifies that compliance with the previous revision, dated 30 September 1998, also satisfies the intent of this amendment. Note 2 references FAA AD 99-15-06, while Note 3 refers to AD/BAe146/75, which addresses installation requirements for modified engines on BAe 146 series aircraft.
The AD mandates that the specified modifications must be carried out during any shop visit for a scheduled hot section inspection, within 10,000 cycles in service after the effective date of the AD, but no later than 31 December 2003. The directive became effective on 12 July 2001, as signed by Eugene Paul Holzapfel, a delegate of the Civil Aviation Safety Authority.
Failure to comply with this AD could result in severe consequences. The Civil Aviation Regulations 1998 outline penalties for non-compliance, which may include fines or other civil or criminal sanctions. The exact penalties can vary, but they are intended to ensure the safety of air travel by enforcing compliance with airworthiness standards. This AD was published in the Commonwealth of Australia Gazette on 13 June 2001 to ensure widespread awareness and implementation among relevant parties.