Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, are fundamental to the regulation of civil aviation in the country. The 1998 Regulations were introduced to streamline and consolidate various aviation-related laws, thereby creating a more coherent and comprehensive legal framework to ensure the safety and efficiency of civil aviation. One of the specific directives under these Regulations is the Airworthiness Directive (AD) concerning Gates Learjet 24 and 25 Series Aeroplanes, identified as AD/LEARJET/20. This directive was introduced to address safety concerns related to the upper cabin door lock mechanism by mandating a modification that enhances the structural integrity and safety of these aircraft models. The policy objective behind this AD is to mitigate potential risks associated with the door lock mechanism, thereby protecting the safety of passengers and crew. The AD/LEARJET/20 specifically requires the modification of the upper cabin door lock mechanism bolts in affected aircraft by installing the Gates Learjet Kit No. AMK 79-9. This modification, which involves installing drilled bolts and lockwiring these bolts in situ, is intended to provide an additional safety feature. Compliance with this directive is mandatory, with affected aircraft needing to implement the modifications within 150 hours of time in service after 30 April 1980. The directive applies to all model 24 aircraft with serial numbers ranging from 24-100 to 24-357 and all model 25 aircraft with serial numbers from 25-003 to 25-291.

Scope and Application

The Civil Aviation Regulations 1998, as amended by the Civil Aviation Safety Authority through the Schedule of Airworthiness Directives, specifically apply to all Gates Learjet 24 and 25 series aeroplanes with certain serial numbers, namely model 24 with serial numbers ranging from 24-100 to 24-357 and model 25 with serial numbers ranging from 25-003 to 25-291.3/80. This legislation mandates the modification of the upper cabin door lock mechanism bolts to enhance safety by requiring the installation of Gates Learjet Kit No. AMK 79-9. Compliance with this directive is essential, necessitating the modification to be completed within 150 hours of time in service after 30 April 1980. The directive is a regulatory measure overseen by the Commonwealth of Australia, ensuring that all applicable aircraft meet specified safety standards to protect passengers and crew. The regulation applies nationally and is enforced by the Civil Aviation Safety Authority, with the scope extending only to the specified aircraft models and serial numbers, thus excluding other aircraft from this particular directive.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39, Section 105, includes the Airworthiness Directive (AD) AD/LEARJET/20, which pertains to Gates Learjet 24 and 25 series aeroplanes. This directive mandates modifications to the upper cabin door lock mechanism bolts for certain serial numbers of these models. The requirement is to install Gates Learjet Kit No. AMK 79-9, which includes the installation of drilled bolts and the lockwiring of these bolts in situ (Section 3/80). This modification is aimed at enhancing the safety of the upper cabin door lock mechanism. The AD/LEARJET/20 applies to all model 24 aircraft with serial numbers ranging from 24-100 to 24-357, and all model 25 aircraft with serial numbers from 25-003 to 25-291. The compliance deadline for these modifications is set within 150 hours of time in service after 30 April 1980 (Section 3/80). It is essential that the specified modifications are completed to ensure the continued airworthiness of these aircraft. The Civil Aviation Regulations impose several obligations on the owners and operators of the affected Gates Learjet 24 and 25 series aeroplanes. These include ensuring that the upper cabin door lock mechanism bolts are modified according to the directive within the stipulated timeframe. Owners and operators must ensure that the modifications are carried out by authorised personnel and that all necessary documentation is maintained to demonstrate compliance with the AD. Failure to comply with these requirements can result in serious consequences. Failure to adhere to the provisions of AD/LEARJET/20 may result in severe penalties and consequences. The Civil Aviation Regulations do not explicitly state the maximum penalties for non-compliance with this specific AD, but general regulatory breaches under the Civil Aviation Act 1988 can result in significant fines and potential criminal charges for individuals or corporations. Non-compliance could also lead to the suspension or revocation of the aircraft's certificate of airworthiness, effectively grounding the aircraft until the required modifications are completed. Therefore, it is imperative for all affected parties to comply with the directive to avoid these serious repercussions.