AD/HU 369/44 Amdt 1 - Collective Torque Tube and Bungee Support Brackets - Inspection

Overview

The Civil Aviation Regulations 1998, as amended, are fundamental to ensuring the safety and regulation of civil aviation in Australia, overseen by the Civil Aviation Safety Authority (CASA). Within this legislative framework, Part 39 specifically addresses airworthiness directives that are essential for maintaining the safety standards of aircraft. One such directive, AD/HU 369/44 Amendment 1, pertains to the McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters. This directive was introduced to address the identified issue of potential damage or cracking in the collective torque tube and bungee support brackets, particularly in the lug area, which could compromise the structural integrity of the helicopters. The policy objective is to ensure these aircraft remain airworthy by mandating regular inspections within specified time intervals to identify and rectify any issues with the torque tube brackets and bungee support brackets, thereby maintaining the overall safety of the fleet.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, issued by the Civil Aviation Safety Authority, apply to the maintenance and airworthiness directives concerning McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters, particularly those identified by specific serial numbers in the 500D model range. This regulation is designed to ensure the safety of these aircraft by mandating inspections of the collective torque tube and bungee support brackets. The legislation applies to all 500D model helicopters with the specified serial numbers, ensuring that these aircraft meet the required safety standards within 100 hours of time in service after 30 June 1980. The geographic reach of this legislation is national, as it is administered by the Commonwealth of Australia, thereby applying uniformly across all states and territories. This directive aims to prevent damage or cracks in the torque tube bracket and to ensure the collective bungee support bracket maintains the necessary web thickness. The regulation may be further extended or restricted through subordinate instruments issued by the Civil Aviation Safety Authority, ensuring ongoing compliance and safety in the aviation sector.

Key Provisions

The Civil Aviation Regulations 1998, specifically under Part 39 - 105 and the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, contain detailed operational provisions for maintaining the safety and airworthiness of aircraft. Section AD/HU 369/44 Amendment 1 addresses the inspection of the collective torque tube and bungee support brackets for McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters, specifically targeting the 500D model with certain serial numbers (Section 1). This directive was issued on 6 August 1980 to ensure that the specified aircraft are inspected for potential damage or cracks in the torque tube bracket and to check the web thickness of the collective bungee support bracket (Section 2). Compliance with these provisions is mandatory, and operators of the affected aircraft must ensure that the required inspections are conducted within 100 hours of the aircraft being in service after 30 June 1980 (Section 3). Failure to adhere to these directives could compromise the structural integrity of the aircraft, leading to severe safety implications. The affected aircraft are required to be inspected and any necessary repairs or replacements must be performed to meet the standards set forth in Hughes SIN No. DN-54.1 (Section 4). Failure to comply with the airworthiness directives can result in severe consequences. Operators who do not adhere to the inspection and maintenance requirements outlined in these regulations may face legal and financial penalties. The exact penalties are not specified within the document but typically can include fines, suspension of the aircraft's operating certificate, or other regulatory actions that could disrupt operations. Ensuring compliance is therefore critical for maintaining the safety and legality of aircraft operations within Australian airspace (Section 5).