AD/MU-2/24 Amdt 1 - Nose Landing Gear L/H Drag Strut Attach Bracket - Inspection and Replacement

Overview

The Civil Aviation Regulations 1998, as part of the Australian regulatory framework, include specific provisions concerning the airworthiness of aircraft. Enacted by the Commonwealth of Australia, this legislation aims to ensure that civil aviation operations maintain high safety standards. The Regulations, administered by the Civil Aviation Safety Authority, address various aspects of aviation safety, including the issuance of airworthiness directives. One such directive, AD/MU-2/24 Amendment 1, pertains to the nose landing gear L/H drag strut attach bracket on Mitsubishi MU-2 Series aeroplanes. This directive was introduced to rectify identified issues with specific models and serial numbers of these aircraft, ensuring compliance with safety standards through required inspections and replacements. The overarching policy objective is to safeguard the integrity and reliability of the aircraft, thereby protecting passengers, crew, and the public.

Scope and Application

The Civil Aviation Safety Authority (CASA) regulation AD/MU-2/24 Amendment 1 pertains specifically to certain models of Mitsubishi MU-2 series aeroplanes. It applies to all MU-2B-30/-35/-36 aircraft with serial numbers ranging from 501 to 696, excluding serial numbers 652 and 661, as well as to MU-2B-35/-36A/-60 models with serial numbers 652SA, 661SA, 697SA through 799SA, and 1501SA through 1553SA, and 1555SA through 1562SA. This directive mandates inspections and, if necessary, the replacement of the left-hand drag strut attach bracket of the nose landing gear to ensure airworthiness. The inspections must be conducted within 100 hours of time in service after the aircraft components have accumulated more than 1000 hours of service, following the specified dates. Compliance with the directive is enforced through the use of Mitsubishi Service Bulletin No. 195 or Mitsubishi Aircraft International Service Bulletin No. SBO 46/32-005, whichever is applicable. The requirement to comply with this directive is applicable throughout the Commonwealth of Australia, falling under the jurisdiction of the Civil Aviation Safety Authority. The regulation does not specify any exclusions or exemptions, and compliance is mandatory for the specified aircraft models within the stated parameters.

Key Provisions

The Civil Aviation Regulations 1998, specifically under Part 39, section 105, outlines the Airworthiness Directives (ADs) for Mitsubishi MU-2 series aeroplanes. One such AD, AD/MU-2/24 Amendment 1, pertains to the nose landing gear left-hand drag strut attach bracket. This directive is crucial for maintaining the structural integrity and safety of the aircraft in question (section 1). It applies to specific models of the MU-2 series aeroplanes with particular serial numbers, excluding some, and mandates compliance with certain Mitsubishi Service Bulletins or Aircraft International Service Bulletins (section 2). It is also cross-referenced with JCAB AD No. TCD-2263-83. The AD requires that inspections and subsequent replacements of the specified component be carried out under specific conditions. Aircraft owners and operators must inspect the nose landing gear left-hand drag strut attach bracket within 100 hours after the aircraft has accumulated 1000 hours of service post-30 June 1983, if the component already has more than 1000 hours of service. If the component does not meet this threshold, inspections must be carried out within 100 hours after the component itself accumulates 1000 hours of service (section 3). Furthermore, the defective bracket must be replaced with an improved bracket, part number 030A-31121-11, following the guidance provided in the specified service bulletins (section 4). Failure to comply with the AD/MU-2/24 Amendment 1 may result in severe consequences. The regulations impose a duty on aircraft owners and operators to ensure that the specified inspections and replacements are completed as required. Non-compliance could potentially lead to the aircraft being deemed unairworthy, which could result in grounding of the aircraft until the required actions are taken. The penalties for non-compliance with these regulations can include fines and other sanctions imposed by the Civil Aviation Safety Authority (CASA) (section 5). The specific maximum penalties are not detailed in the provided text, but they can be severe, reflecting the critical nature of maintaining aircraft airworthiness. In summary, AD/MU-2/24 Amendment 1 mandates specific inspections and replacements of the nose landing gear left-hand drag strut attach bracket for certain Mitsubishi MU-2 series aeroplanes. Compliance with this directive is essential to maintain the airworthiness of the aircraft. Failure to adhere to these requirements can result in serious consequences, including financial penalties and potential grounding of the aircraft. The directive references specific service bulletins for detailed procedures, ensuring that the maintenance and repair work is performed correctly and safely.