Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of the Commonwealth of Australia, provide a comprehensive regulatory framework for civil aviation safety and operations. Among these regulations, Part 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives plays a critical role in ensuring that aircraft and aeronautical products meet specific safety standards. One such Airworthiness Directive (AD) is AD/Y12/6, issued on 3 March 2003 by the Civil Aviation Safety Authority (CASA) to address a safety issue identified in certain Harbin Y12 Series Aeroplanes. The directive mandates the inspection and replacement of control wheel pulley bearings to rectify a manufacturing error that could potentially lead to control wheel buffet. This AD aims to enhance the safety and reliability of the specified aircraft models by enforcing precise maintenance procedures, thereby mitigating the risk of unsafe conditions during flight.

Scope and Application

This Airworthiness Directive (AD) issued under the Civil Aviation Regulations 1998 (CAR 1998) applies specifically to Harbin Y12 Series aeroplanes with particular serial numbers, namely S/N 3812 (024), 3813 (025), 3814 (026), 3816 (028), and 3817 (029). It mandates that the control wheel pulley bearings be checked to ensure they are of the correct Part Number (P/N) 980067 and, if not, replaced to prevent control wheel buffet which could result from the installation of the wrong bearing during manufacture. The directive requires compliance before further flight and is applicable to aircraft within the jurisdiction of the Commonwealth of Australia, as it was issued by the Civil Aviation Safety Authority (CASA). Notably, this AD is effective from 20 March 2003 and was subsequently notified in the Commonwealth of Australia Gazette on 26 February 2003, ensuring that all relevant parties are informed and can act accordingly to maintain the safety standards required by Australian civil aviation regulations.

Key Provisions

The Civil Aviation Regulations 1998 (CAR 1998) include a specific section detailing Airworthiness Directives (ADs), which are issued to address safety issues with aircraft or aeronautical products. In Part 39 - 105, the Civil Aviation Safety Authority (CASA) issues AD/Y12/6 for the Harbin Y12 Series Aeroplanes, specifically addressing the control wheel pulley bearing. The directive applies to Y12II aircraft with certain serial numbers (3812, 3813, 3814, 3816, and 3817). The requirement section stipulates that operators must check if the control wheel pulley bearing installed is Part Number (P/N) 980067 and replace any bearings that do not match this specification. This requirement is aimed at correcting a manufacturing issue where the wrong bearing was fitted, which could result in control wheel buffet. The compliance section mandates that these checks and replacements must be completed before further flight, unless the actions have already been performed. The obligations imposed by this AD are clear and specific. Operators of the affected Harbin Y12II aircraft must ensure that the control wheel pulley bearings are correctly identified and replaced if necessary. This involves a thorough inspection and verification process to confirm the part number of the bearings. Failure to adhere to these requirements can compromise the airworthiness and safety of the aircraft, leading to potential operational risks. Furthermore, the directive must be implemented prior to any further flight of the affected aircraft, ensuring that the necessary safety measures are in place before the aeroplane is operated again. Failure to comply with the requirements of this Airworthiness Directive may have serious consequences. The AD is legally binding, and non-compliance could be considered a breach of the Civil Aviation Regulations 1998. Such breaches may result in penalties, including fines or other civil or criminal sanctions. While the specific penalties are not detailed in the AD, non-compliance with CASA directives is taken seriously, as these measures are designed to ensure the safety and airworthiness of aircraft operating in Australian airspace. Operators must therefore ensure that they adhere strictly to the requirements set out in the directive to avoid any legal repercussions.