AD/LEARJET/4 - Tip Tank Fuel Pressure Relief - Modification

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, form part of a broader regulatory framework overseen by the Civil Aviation Safety Authority (CASA). Specifically, Part 39 - 105 of these regulations addresses Airworthiness Directives (ADs) which are mandatory instructions issued by CASA to ensure the safe operation of aircraft. The legislative instrument F2006B11156 focuses on AD/LEARJET/4, which pertains to Gates Learjet 24 and 25 series aeroplanes, specifically targeting a modification to the tip tank fuel pressure relief system. This directive was introduced to address a safety issue identified with certain serial numbers of the Learjet 24 and 25 models, ensuring compliance with safety standards within a specified timeframe. The objective of this legislation is to mitigate potential risks associated with fuel system failures, thereby enhancing overall aviation safety.

Scope and Application

The Civil Aviation Regulations 1998, as part of the Australian legislative framework, apply to a wide range of entities including individuals and corporations involved in the operation of aircraft, aircraft manufacturers, maintenance organisations, and flight crew members. Specifically, Part 39 - 105 pertains to Airworthiness Directives, which mandate compliance for ensuring the airworthiness of aircraft. This particular legislative instrument focuses on Gates Learjet 24 and 25 Series Aeroplanes, targeting specific serial numbers for these models. The regulation applies to aircraft within the defined serial number ranges and mandates the installation of a modification kit, specifically Modification Kit No. AMK 73-2, within 100 hours of time in service after 28 September 1973. The regulation applies across the Commonwealth of Australia, ensuring uniform safety standards. There are no stated exclusions or exemptions within the scope of this particular Airworthiness Directive, and compliance is strictly enforced. The regulation's application may be extended or refined through subordinate instruments, which could provide additional details or clarifications on compliance and enforcement mechanisms.

Key Provisions

The key operative sections of the Civil Aviation Regulations 1998, PART 39 - 105, specifically AD/LEARJET/4, pertain to the modification of Gates Learjet 24 & 25 series aeroplanes. Section 39.105 mandates that specific models of these aircraft, identified by their serial numbers, must undergo a modification to the tip tank fuel pressure relief system. This is to ensure compliance with the requirements set forth by the Civil Aviation Safety Authority (CASA). The modification must be carried out using the Modification Kit No. AMK 73-2, and the directive applies to aircraft with serial numbers ranging from 24-218 to 24-269 for Model 24 and from 25-061, 25-064, and 25-070 to 25-124 for Model 25. Compliance with this directive is required within 100 hours of time in service after 28 September 1973. The Act imposes specific obligations on the operators and owners of the affected aircraft. They must ensure that the required modifications are implemented using the specified modification kit and within the stipulated timeframe. This involves coordinating with certified repair facilities or engineers authorised to perform such modifications. Failure to comply with the directive within the specified period may result in the aircraft being deemed non-airworthy, thereby prohibiting its operation until the modifications are completed. Breach of the provisions outlined in AD/LEARJET/4 can lead to significant consequences. Operators and owners who fail to comply with the directive may face enforcement actions by CASA. These actions can include fines, the grounding of non-compliant aircraft, and potential legal proceedings. The Civil Aviation Regulations 1998 do not explicitly state maximum penalties for this specific directive; however, penalties for non-compliance with CASA directives can be severe and are commensurate with the severity of the breach. The potential consequences underscore the importance of adhering to the specified modifications to ensure the safety and airworthiness of the aircraft in question.