Overview

The Civil Aviation Safety Regulations 1998, introduced by the Australian Parliament, aim to ensure the safety and efficiency of civil aviation within Australia. This legislation provides the framework for maintaining airworthiness standards and safety oversight, addressing gaps in ensuring that aircraft and aeronautical products meet required safety standards. The Civil Aviation Safety Authority (CASA) plays a crucial role in this framework by issuing Airworthiness Directives (ADs) to address specific safety concerns. For instance, AD/T5508D/2, issued in July 2003, mandates the replacement of certain components in Honeywell (Avco Lycoming) T5508D series turbine engines to prevent potential power loss due to bleed band failure. This directive underscores CASA's commitment to maintaining high safety standards in civil aviation by ensuring that identified unsafe conditions are promptly addressed through regulatory action.

Scope and Application

The Airworthiness Directive issued under the Civil Aviation Safety Regulations 1998 applies specifically to Honeywell (Avco Lycoming) T5508D engines that are fitted with certain parts: specifically, the P/N 2-160-147-02 retaining plate spacers and P/N 2-161-182-01 compressor air bleed bands. This directive is necessitated by identified safety concerns that could potentially lead to power loss from the engine due to failure of the bleed band. The directive mandates that these parts be replaced, with the P/N 2-160-147-02 retaining plate spacers being replaced by P/N 2-160-561-01 retainers and the P/N 2-161-182-01 compressor air bleed bands being replaced by P/N 2-161-182-03 compressor air bleed bands, in accordance with Avco Lycoming Service Bulletin 5508-0007. This requirement must be met prior to the issuance of an Australian certificate of airworthiness. The directive is issued by the delegate of the Civil Aviation Safety Authority and is applicable nationwide within the Commonwealth of Australia. The directive was published in the Commonwealth of Australia Gazette on 18 June 2003, and became effective on 10 July 2003.

Key Provisions

The Civil Aviation Safety Regulations 1998 (CASR 1998), specifically Part 39, Section 106, includes provisions for Airworthiness Directives (ADs) that address safety concerns related to civil aviation. One such AD is AD/T5508D/2, issued by the Civil Aviation Safety Authority (CASA) delegate, Jim Coyne, on 26 May 2003. This AD (section 39.1(1)) applies to Honeywell (Avco Lycoming) T5508D engines fitted with certain parts and mandates actions to address a safety issue. The AD requires that specific parts be replaced to prevent power loss from the engine due to bleed band failure. The AD imposes obligations on the operators and owners of the affected aircraft or aeronautical products. Specifically, the AD mandates that the replacement of the P/N 2-160-147-02 retaining plate spacers with P/N 2-160-561-01 retainers and the replacement of P/N 2-161-182-01 compressor air bleed bands with P/N 2-161-182-03 compressor air bleed bands must be carried out in accordance with Avco Lycoming Service Bulletin 5508-0007. The action must be taken before the issue of an Australian certificate of airworthiness. Failure to comply with the AD may result in significant safety risks, as the AD is designed to mitigate a potential condition that could lead to engine power loss. While the CASR 1998 does not explicitly state penalties for non-compliance with an AD, non-compliance could result in the aircraft being deemed airworthy, which may lead to enforcement actions by CASA. These actions could include fines, suspension or revocation of the aircraft's certificate of airworthiness, or other regulatory measures to ensure compliance and maintain safety standards in civil aviation.