Overview

The Civil Aviation Regulations 1998, administered by the Civil Aviation Safety Authority, include various directives aimed at ensuring the safety of aircraft operations within Australia. One such directive, introduced to address the issue of nose landing gear malfunctions in British Aerospace (Hawker Siddeley) HS 748 Series aeroplanes, is AD/HS 748/14. This directive was enacted to ensure the continued integrity of the nose landing gear support structure, which had experienced failures due to the degradation of certain components. The policy objective was to mandate the replacement of specific parts within a defined service life to prevent such failures, ensuring the safety and reliability of the aircraft during operations. Compliance with this directive is critical to mitigate the risk of malfunctions, which could have serious safety implications.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to all aircraft operators, maintenance providers, and other relevant entities within the Commonwealth of Australia that are involved with the operation or maintenance of British Aerospace (Hawker Siddeley) HS 748 series aeroplanes that have undergone Modification 1472 and are yet to undergo Modification 7513.5/95. The geographic reach of this regulation extends to all areas under Australian jurisdiction, ensuring a uniform standard of compliance across the nation. The regulation requires the replacement of specific nose landing gear jack support bracket attachment studs to mitigate the risk of landing gear malfunctions, as highlighted in British Aerospace Alert Service Bulletin (ASB) A53/53 Revision 1. Compliance must be achieved before the aircraft reaches 7,000 landings, or earlier if Modification 7513 is incorporated, as this modification cancels the directive by providing bolts with an extended fatigue life. This directive underscores the necessity for adherence to safety policies to maintain the integrity of the aircraft’s structural components.

Key Provisions

The Civil Aviation Regulations 1998, particularly Part 39 (section 39.105), establish the requirements for maintaining the airworthiness of aircraft operating in Australian airspace. Section 39.105 specifically pertains to the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, which includes AD/HS 748/14 for British Aerospace (Hawker Siddeley) HS 748 Series Aeroplanes. This Airworthiness Directive mandates that all HS748 aircraft that have undergone Modification 1472 but are still awaiting Modification 7513.5/95 must replace all Nose Landing Gear Jack Support Bracket Bearing Cap Attachment Studs, part number 2cD13248. This requirement is to be carried out in accordance with the British Aerospace Alert Service Bulletin (ASB) A53/53 Revision 1, and references the UK Civil Aviation Authority (CAA) AD 013-11-86 for further guidance. The directive aims to ensure the structural integrity of the nose landing gear support by addressing potential issues that could arise from the specified components. Operators of HS748 aircraft falling within the scope of AD/HS 748/14 are obligated to comply with the directive's requirements. This includes replacing the specified attachment studs before the aircraft reaches 7,000 landings. The directive emphasises the importance of adhering to the guidelines outlined in the British Aerospace ASB A53/53 Revision 1 to ensure that the replacement is performed correctly and safely. The inclusion of Modification 7513.5/95 in the aircraft's modification history cancels the need for this AD, as it introduces bolts with an extended fatigue life, thereby mitigating the issues addressed by the directive. Failure to comply with AD/HS 748/14 could result in serious safety implications, as it pertains to the structural integrity of a critical component of the aircraft. Non-compliance with airworthiness directives can lead to serious civil or criminal consequences. While specific penalties are not detailed in the text, non-compliance with Civil Aviation Regulations can result in enforcement actions by CASA. These actions can include fines, the suspension or revocation of an aircraft's certificate of airworthiness, and potential criminal charges if the non-compliance leads to an accident or endangers safety. The potential penalties underscore the importance of adhering to these regulations to maintain the highest standards of aviation safety.