AD/HU 269/88 - Collective Pitch Mixer Bellcrank

Overview

The Civil Aviation Regulations 1998, enacted by the Commonwealth of Australia, were introduced to ensure the safety and regulation of civil aviation in Australia. The legislation addresses the need for comprehensive safety standards and procedures to govern the operation and maintenance of aircraft. This specific regulation, found in Part 39, focuses on issuing airworthiness directives to enhance safety and compliance across the aviation industry. The Civil Aviation Safety Authority (CASA) is the enacting body, and its policy objective is to mandate strict adherence to safety standards, thereby minimising risks and ensuring the highest level of safety for all aviation activities within Australia. One such airworthiness directive, AD/HU 269/88, pertains to the collective pitch mixer bellcrank in Schweizer (Hughes) 269 Series helicopters. This directive was introduced to address the potential issue of incorrect bellcrank fittings in certain models, which could compromise the aircraft's safety. The requirement mandates compliance with Schweizer Service Information Notice No N204, ensuring that the correct parts are installed before any maintenance release is issued or an aircraft is operated post 31 October 1987. This directive applies to all model 269A, 269A-1, 269B, and model 269C helicopters with a serial number prior to 1274, emphasising the importance of meticulous inspection and adherence to safety standards.

Scope and Application

The Civil Aviation Regulations 1998, specifically under Part 39 - 105 and the Civil Aviation Safety Authority schedule of Airworthiness Directives, mandates compliance for all Schweizer (Hughes) 269 Series helicopters, including models 269A, 269A-1, 269B, and model 269C helicopters with serial numbers prior to 1274. The requirement is to adhere to Schweizer Service Information Notice No N204 regarding the collective pitch mixer bellcrank, ensuring that any corrective action is taken either at the next scheduled inspection for the issue of a Maintenance Release following 31 October 1987, or before the installation of the component on an aircraft after this date. This regulation applies nationally across Australia, enforced by the Civil Aviation Safety Authority, and is not limited by state or territory boundaries. The directive does not explicitly exclude any specific entities or conduct from its scope, but rather applies broadly to all pertinent aircraft within the specified model range and serial numbers. The application of this directive may be further extended or modified through subordinate instruments issued by the Civil Aviation Safety Authority.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, includes a detailed schedule of airworthiness directives that apply to various aircraft models, including the Schweizer (Hughes) 269 Series Helicopters. One such directive, AD/HU 269/88, pertains to the collective pitch mixer bellcrank for model 269A, 269A-1, 269B, and model 269C helicopters with a serial number prior to 1274. The directive mandates compliance with Schweizer Service Information Notice No N204. The directive requires that the corrective action be taken in accordance with the specified service information notice. This action must be completed at the next scheduled inspection to issue a Maintenance Release after 31 October 1987. Additionally, the directive requires that the corrective action be performed before the installation of the helicopter on an aircraft after 31 October 1987. These requirements ensure that any potential safety issues related to an incorrect collective pitch mixer bellcrank are addressed in a timely manner. The obligations imposed by this directive on the parties or entities it governs include ensuring that the collective pitch mixer bellcrank is correctly identified and, if necessary, replaced or adjusted. Operators of these helicopters must adhere to the timeline specified in the directive, ensuring that the corrective action is completed before the next scheduled inspection or before the helicopter is installed on an aircraft after the specified date. This requirement ensures that the safety and airworthiness of the helicopters are maintained according to the regulations. Failure to comply with the directive may result in serious safety risks and potential regulatory consequences. The Civil Aviation Safety Authority (CASA) enforces these regulations, and non-compliance can lead to enforcement actions. While the specific penalties are not detailed in the directive itself, CASA has the authority to impose fines, suspend or revoke aircraft certificates, and take other corrective measures as necessary to ensure compliance with the regulations. The penalties for non-compliance can be significant, reflecting the critical nature of maintaining airworthiness in aviation safety.