AD/GAZELLE/17 - Intermediate Gearbox Attachment

Overview

The Civil Aviation Regulations 1998, established by the Australian Parliament, serve to regulate civil aviation safety standards within Australia. Within this legislative framework, the 1998 Regulations include specific Airworthiness Directives (AD) aimed at maintaining the safety and airworthiness of aircraft. One such directive, AD/GAZELLE/17, was introduced to address issues identified with the Eurocopter SA341 and SA342 (Gazelle) Series Helicopters. The directive was enacted to mitigate the risk of wear on the forward attachment lug bolt of the intermediate gearbox, which, if unaddressed, could result in the loss of the gearbox during operation. This legislative measure aims to ensure that all affected helicopters adhere to the requirements set out in Aerospatiale Service Bulletin No 65-43 and comply with the specified inspections before and after modifications to maintain operational safety. The policy objective behind AD/GAZELLE/17 is to enforce stringent safety protocols to prevent mechanical failure and enhance the reliability of the Eurocopter SA341 and SA342 helicopters. The directive mandates actions in accordance with the Aerospatiale Service Bulletin No 65-43 and requires reinspection at each removal and installation of the intermediate gearbox until the specified modification AMS 341A07.1636 is incorporated. This legislative instrument, administered by the Civil Aviation Safety Authority, reflects a commitment to safeguarding the aviation industry by proactively addressing identified safety concerns and ensuring that all aircraft meet necessary safety standards.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to all operators and owners of Eurocopter SA341 and SA342 (Gazelle) series helicopters equipped with an intermediate gearbox that has not been modified by AMS 341A07.1636. This regulation applies on a national level across the Commonwealth of Australia and is enforced by the Civil Aviation Safety Authority (CASA). The directive requires adherence to Aerospatiale Service Bulletin No 65-43, referencing DGAC AD 92-011-036(B), to address wear found on the forward attachment lug bolt, which, if left unchecked, could result in the loss of the intermediate gearbox. Compliance with this Airworthiness Directive is mandatory, with the initial requirement set before 8 February 1992, followed by reinspection at each removal or installation of the intermediate gearbox until the specified modification is implemented. The scope of this regulation does not explicitly include exclusions, exemptions, or thresholds, implying that all applicable aircraft must comply unless otherwise specified through subordinate instruments.

Key Provisions

The primary sections of the Civil Aviation Regulations 1998, Part 39 - 105, specifically addressing the Airworthiness Directives for the Eurocopter SA341 and SA342 (Gazelle) Series Helicopters (AD/GAZELLE/17), mandate that all helicopters of these models equipped with an unmodified intermediate gearbox must adhere to certain standards to ensure safety and airworthiness. Section 39-105 (1) states that these helicopters must comply with the requirements outlined in Aerospatiale Service Bulletin No 65-43. This involves inspecting and, if necessary, taking corrective action on the forward attachment lug bolt to prevent wear, which could otherwise lead to the loss of the intermediate gearbox. The obligations imposed by these regulations are clear and specific. Operators of SA341 and SA342 helicopters must ensure that before 8 February 1992, the specified inspections and actions are completed. Furthermore, operators must reinspect the gearbox at each removal and installation following the initial compliance date until the modification AMS 341A07.1636 has been incorporated. This ongoing requirement underscores the importance of continuous maintenance and vigilance in ensuring the helicopters remain airworthy. Failure to comply with these directives can have serious legal and operational consequences. Under section 39-105 (2), any breach of these regulations can result in enforcement actions by the Civil Aviation Safety Authority (CASA). The potential penalties for non-compliance include substantial fines and possible grounding of the aircraft until the required modifications and inspections are satisfactorily completed. The seriousness of these potential outcomes highlights the critical nature of adhering to the stipulated airworthiness directives.