AD/BELL 206/132 - Tail Rotor Driveshaft Bearing Support Brackets

Overview

The Civil Aviation Regulations 1998 were enacted to ensure the safety and efficiency of civil aviation within Australia. Part 39 of these regulations addresses airworthiness directives, which are formal and enforceable rules regarding the design, production, and maintenance of aircraft. Specifically, the legislation aims to ensure that aircraft meet certain safety standards and continue to be airworthy throughout their operational life. This particular regulation was introduced to address the problem of manufacturing errors that could potentially result in critical components such as tail rotor driveshaft bearing support brackets becoming cracked, which could compromise the safety of the aircraft. The policy objective behind this regulation is to maintain the highest safety standards by mandating regular inspections and ensuring compliance with specific inspection protocols. The enacting body for this regulation is the Civil Aviation Safety Authority (CASA), which is responsible for regulating and enforcing safety standards within the Australian civil aviation industry. The regulation targets Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 series helicopters, requiring a one-time dye penetrant inspection of the inner bend radius of bearing support brackets identified in the regulation. The inspection must be conducted in accordance with specified Bell Alert Service Bulletins and before the aircraft accumulates 100 hours of time in service after 27 April 1995, or before installation on an aircraft, whichever comes first. This ensures that any potential issues arising from the manufacturing error are identified and rectified promptly, thereby enhancing aviation safety.

Scope and Application

The Civil Aviation Regulations 1998, as amended, apply to all relevant helicopter manufacturers, operators, maintenance personnel, and other stakeholders within the civil aviation industry. Specifically, this legislative instrument targets the inspection and maintenance of Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series helicopters, including model 206L series excluding specific serial numbers, and all model 206 and TH-57 series helicopters except for model 206B-3 from a particular serial number onwards. The legislation mandates that these helicopters undergo a dye penetrant inspection of the inner bend radius of specific bearing support brackets, following the guidelines set out in Bell Alert Service Bulletins for each model series. The inspection must be conducted before the helicopter accumulates 100 hours of time in service after 27 April 1995, or before installation on an aircraft, whichever comes first. This directive is aimed at addressing a manufacturing error that could potentially result in cracked brackets being installed on the aircraft. The regulation is applicable under the jurisdiction of the Commonwealth of Australia and extends its reach to ensure the safety and airworthiness of the specified helicopter models across the nation.

Key Provisions

The Civil Aviation Regulations 1998, Part 39 - 105, specifically address the airworthiness of certain helicopter models through the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives. Under this regulation, particular attention is directed towards Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 series helicopters. The key provision in this legislative instrument is AD/BELL 206/132, which pertains to the tail rotor driveshaft bearing support brackets on these helicopter models (section 105.12). This directive mandates a detailed inspection of the inner bend radius of the bearing support brackets P/N 206-030-433, 206-030-407, and 206-033-412 to ensure they are free from manufacturing defects. The obligations imposed by this directive are quite specific. Operators of affected Bell 206 and Agusta Bell 206 series helicopters must conduct a dye penetrant inspection on the designated bearing support brackets. This inspection must adhere to the guidelines set out in Bell Alert Service Bulletins 206L-92-84 for model 206L helicopters and 206-92-69 for model 206 and TH-57 helicopters (section 105.13). It is essential that these inspections are carried out before the brackets reach 100 hours of time in service after 27 April 1995 or before the brackets are installed on an aircraft, whichever comes first. This requirement stems from a manufacturing error that could result in the installation of cracked brackets, posing a significant safety risk. Failing to comply with these airworthiness directives can result in severe consequences. While the Civil Aviation Regulations do not explicitly state the penalties for non-compliance with airworthiness directives, general aviation regulations under the Civil Aviation Act 1988 may apply. Non-compliance can lead to enforcement actions by CASA, including fines, suspension or revocation of airworthiness certificates, and potential criminal charges if the non-compliance results in an aviation accident or incident. The maximum penalties can vary, but they can include substantial fines and imprisonment for individuals responsible for the non-compliance. Such stringent measures underscore the importance of adhering to these directives to maintain the highest safety standards in aviation.