AD/FU24/51 Amdt 2 - Fin Forward Attachment Fitting

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105, addresses the safety directives concerning aircraft airworthiness, as overseen by the Civil Aviation Safety Authority. This legislation was enacted to ensure the safety and reliability of aircraft operations by setting standards and directives that must be followed. The problem it was introduced to address includes the prevention of structural failures in aeroplanes, particularly the FU 24 Series Aeroplanes manufactured by Airparts (NZ) Ltd., through mandated maintenance and inspection processes. The policy objective outlined in the regulations is to enhance the safety of air travel by reducing the risk of mechanical failures through rigorous compliance with airworthiness directives. This legislation, as part of the Civil Aviation Regulations, was enacted by the Parliament of Australia and administered by the Civil Aviation Safety Authority. The regulations include directives such as AD/FU24/51 Amendment 2, which requires specific inspections and maintenance of the fin forward attachment fittings to prevent failure due to cracks or corrosion. The requirement for these inspections is set to ensure that any defects are identified and rectified in a timely manner, thereby maintaining the structural integrity of the aircraft and ensuring safe operation.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 105, applies to all entities involved in the manufacture, maintenance, and operation of the FU 24 Series Aeroplanes produced by Airparts (NZ) Ltd. This regulation is applicable to the Civil Aviation Safety Authority (CASA) and mandates compliance from all operators of the specified aircraft models that have been in service for one year since their manufacture. The geographic reach of these regulations is national, governing civil aviation within Australia. The regulation sets out clear requirements for maintaining the airworthiness of the specified aircraft models by addressing the fin forward attachment fitting to prevent failures due to cracks or corrosion. The compliance must be achieved within 100 hours of time in service following 31 January 1977 and subsequently every 12 months. The regulation also allows for the relaxation of stringent compliance requirements in light of new information, as seen in Amendment 1, and further specifies the inspection and maintenance requirements in Amendment 2. This regulation extends its application through subordinate instruments to ensure continuous safety and operational standards in the aviation industry.

Key Provisions

The Civil Aviation Regulations 1998, specifically under PART 39 - 105, mandate airworthiness directives to ensure the safety of aircraft. One such directive, AD/FU24/51 Amendment 2, pertains to the FU 24 Series Aeroplanes manufactured by Airparts (NZ) Ltd. The directive applies to all models that have been in service for one year since manufacture (Section 1). The directive requires that the fin forward attachment fitting be inspected and maintained to prevent failure (Section 2). This involves removing the fairing P/N 24231 at the base of the fin leading edge, inspecting the fitting P/N 243017-2 or 243017-3 and the adjacent fin and fuselage structure for cracks and corrosion, and taking necessary actions such as removing corrosion or renewing parts and protecting surfaces (Section 3). This directive is crucial to maintain the structural integrity of the aircraft and prevent potential failures. Compliance with AD/FU24/51 Amendment 2 is mandatory. Operators must ensure that these inspections and maintenance actions are performed within 100 hours of time in service after 31 January 1977, and thereafter at intervals not exceeding 12 months (Section 4). The revised effective date of this directive is 1 February 1996, reflecting adjustments made to ensure the directive does not negatively impact the sealing of the area in question. This ongoing compliance requirement underscores the importance of regular maintenance to uphold airworthiness standards. Failure to comply with the provisions of AD/FU24/51 Amendment 2 can result in significant consequences. The Civil Aviation Safety Authority (CASA) has the authority to enforce compliance, and non-compliance can lead to enforcement actions, including fines and potential grounding of the aircraft until the required maintenance is performed. The maximum penalties for non-compliance with airworthiness directives are set out in the Civil Aviation Act 1988, and can include substantial fines and imprisonment for serious breaches that result in safety hazards. Therefore, operators must prioritise adherence to these directives to avoid legal and safety repercussions.