AD/HU 269/79 Amdt 1 - Main Rotor Drive Shaft

Overview

The Civil Aviation Regulations 1998, amended through F2006B10638, was enacted to ensure the safety and regulation of civil aviation in Australia. This particular legislative instrument focuses on issuing an airworthiness directive concerning Schweizer (Hughes) 269 Series Helicopters. The directive addresses a critical safety concern identified with the main rotor drive shafts of certain model 269C helicopters, specifically those with serial numbers within a defined range. The aim of this amendment is to mandate compliance with Schweizer Service Information No. N199-1, ensuring that these aircraft meet necessary safety standards. The Australian Parliament enacted this regulation through the Civil Aviation Authority, reflecting a policy objective to maintain high safety standards in civil aviation and mitigate risks associated with aircraft operations. This legislative instrument underscores the commitment to ensuring that all civil aviation activities within Australia adhere to stringent safety protocols. By specifying the requirement for compliance with Schweizer Service Information No. N199-1 during scheduled inspections, the regulation directly targets the identified issue with the main rotor drive shafts, aiming to prevent potential safety hazards. The directive ensures that operators of affected helicopters take necessary corrective actions to maintain airworthiness, thereby protecting the safety of all persons on board and contributing to the overall integrity of the national civil aviation system.

Scope and Application

The Civil Aviation Regulations 1998, as part of the Civil Aviation Safety Authority's (CASA) legislative framework, apply to all model 269C helicopters equipped with specific main rotor drive shafts identified by particular serial numbers. This regulation is specifically concerned with ensuring the airworthiness of these helicopters by addressing the suspected issues with the heat treatment of the main rotor drive shafts. The requirement is that the specified action must be taken in accordance with Schweizer Service Information No. N199-1, during the next scheduled inspection, which must occur at either 300, 400, 600, or 1200 flight hours, whichever comes first after 30 June 1986. This regulation aims to maintain the operational safety and compliance of these helicopters with Australian civil aviation standards. The scope of the regulation is limited to the mentioned serial numbers of the main rotor drive shafts and does not extend to other models or components of the aircraft. The geographic reach of this regulation is nationwide, applying uniformly across Australia as per federal aviation regulations. There are no stated exclusions or exemptions in this directive, and its application is strictly enforced through the CASA. The regulation may also be extended or further detailed by subordinate instruments issued by CASA, ensuring continuous updates and alignment with evolving safety standards.

Key Provisions

The Civil Aviation Regulations 1998, specifically under Part 39 - 105, contain Airworthiness Directives (AD) that mandate the maintenance and operation of certain aircraft to ensure safety. One such directive, AD/HU 269/79 Amendment 1, pertains to Schweizer (Hughes) 269 Series Helicopters (section 11/87). This directive is applicable to all model 269C helicopters equipped with specific main rotor drive shafts (section 1). These shafts are identified by serial numbers 6570, 6573, 6574, 6575, 6604, 6616, 6617, 6622, 6623, 6624, 6625, 6641, 6642, 6643, and 6644. The directive mandates that action be taken in accordance with Schweizer Service Information No. N199-1. This action must be carried out at the next inspection occurring at either 300, 400, 600, or 1200 flight hours, whichever is the first after 30 June 1986 (section 11/87). The underlying concern is the suspect heat treatment of the specified main rotor drive shafts, which necessitates compliance with the outlined service information to mitigate any potential risks. Operators and owners of the affected Schweizer (Hughes) 269 Series Helicopters are required to adhere to these directives to maintain the airworthiness of their aircraft. This involves ensuring that the maintenance personnel follow the specified service information during the required inspections. Failure to comply with these directives could result in the aircraft being deemed unairworthy, leading to potential grounding and further safety risks. Violation of the requirements stipulated in AD/HU 269/79 Amendment 1 may lead to civil or criminal consequences. The Civil Aviation Regulations 1998 impose strict penalties for non-compliance. While the specific penalties are not detailed in this excerpt, non-compliance with airworthiness directives can generally result in fines, enforcement actions, and potentially criminal charges for operators or owners who knowingly allow an unairworthy aircraft to fly. The severity of the penalties may depend on the extent of the non-compliance and any resultant harm or risk posed to aviation safety.