Overview

The Civil Aviation Regulations 1998, as amended, include Part 39 - 105, which deals with Airworthiness Directives issued by the Civil Aviation Safety Authority (CASA) to address safety issues within the aviation industry. Specifically, Airworthiness Directive AD/PC-12/32, issued in 2002, pertains to Pilatus PC-12 Series Aeroplanes and focuses on addressing the unsafe condition of nose landing gear drag links. The Federal Office of Civil Aviation (FOCA) in Switzerland had reported instances of uncommanded nose landing gear extension during cruise flights, which were traced to fatigue cracking in certain nose landing gear drag links, potentially leading to gear collapse during landing. This directive aims to rectify the identified safety issue by mandating the replacement of the specified drag link parts in accordance with the latest maintenance manual instructions. The directive was enacted to ensure the continued safety of aircraft operations by preventing potential catastrophic failures resulting from drag link fatigue.

Scope and Application

This legislative instrument pertains to the Civil Aviation Regulations 1998 (CAR 1998) under the Commonwealth of Australia, specifically targeting the Pilatus PC-12 Series Aeroplanes. The scope of this Airworthiness Directive (AD) applies to all PC-12 and PC-12/45 aircraft equipped with a specific nose landing gear drag link part number 532.20.12.140. The directive mandates that the specified part be replaced in accordance with the latest PC-12 Maintenance Manual instructions, aiming to address the unsafe condition identified by the Civil Aviation Safety Authority (CASA). The directive outlines compliance timelines based on the total number of landings the affected drag link has accumulated, with specific replacement intervals to mitigate the risk of fatigue cracking leading to gear collapse during landing. This AD extends its jurisdiction nationally, impacting aircraft operators and maintenance entities within Australia. While the directive is comprehensive, it is important to note that any additional requirements or modifications may be specified through subordinate instruments issued by CASA.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, details an Airworthiness Directive (AD) issued under subregulation 39.1(1) by a delegate of the Civil Aviation Safety Authority (CASA). This AD applies to all Pilatus PC-12 and PC-12/45 aircraft equipped with a specific nose landing gear drag link. The requirement outlined in the AD is to replace the nose landing gear drag link, part number 532.20.12.140, as detailed in the latest PC-12 Maintenance Manual instructions. This directive is crucial for ensuring the safety of the aircraft by preventing potential uncommanded extension of the nose landing gear during flight, which could lead to gear collapse during landing. Under this AD, the obligations imposed on the relevant parties include the replacement of the specified drag link in a timely manner. For nose landing gear drag links that have accumulated 3,800 or fewer total landings, the replacement must occur before the aircraft reaches 4,000 total landings. For those drag links that have accumulated 3,801 or more total landings, the replacement must occur within 200 landings after 3 July 2002. Following this initial replacement, further replacements should be conducted at intervals not exceeding 4,000 landings. This directive was issued to address safety concerns identified by the Federal Office of Civil Aviation in Switzerland, which reported instances of uncommanded extension of the nose landing gear due to fatigue cracking in certain drag links. Failure to comply with the requirements set forth in this Airworthiness Directive could result in serious safety risks. The AD stipulates that the action must be taken in accordance with the specified instructions and timeframes. Non-compliance with these regulations could lead to civil or criminal consequences, including fines and other penalties as prescribed by the Civil Aviation Regulations 1998. The specific maximum penalties for non-compliance are not detailed in the AD itself but would be governed by the broader regulations under which the AD was issued. It is essential for the parties involved to adhere strictly to the directive to ensure the continued airworthiness and safety of the aircraft in question.