AD/BELL 206/28 - Engine Bell Mouth Seal Doubler - Modification

Overview

The Civil Aviation Regulations 1998, as amended by the instrument F2006B04484, establish comprehensive regulatory frameworks governing civil aviation in Australia. This legislative instrument specifically addresses the safety and airworthiness of aircraft, with a focus on ensuring that all aircraft meet necessary safety standards to protect passengers, crew, and the general public. Enacted by the Australian Parliament, these regulations were introduced to fill a critical gap in maintaining consistent and high standards for aircraft operations across the nation. The policy objective underpinning this legislation is to ensure the safety and reliability of civil aviation, which is vital for the efficient and secure operation of the aviation industry. This particular legislative instrument pertains to Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 series helicopters, outlining airworthiness directives for specific models, namely AB-206A and 206A with serial numbers 1 to 499. The requirement for a modification to the engine Bell mouth seal doubler is intended to be carried out within 100 hours of the helicopter's time in service after 30 September 1970. This directive ensures that the safety and operational efficiency of these helicopters are maintained in accordance with the overarching aim of the Civil Aviation Regulations 1998 to safeguard air travel.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to all model AB-206A and 206A Bell Helicopter Textron Canada (BHTC) and Agusta Bell 206 Series helicopters with serial numbers ranging from 1 to 499. This legislation mandates the modification of the engine Bell mouth seal doubler for these particular models within 100 hours of time in service after 30 September 1970. The regulation extends to ensuring compliance with the AD/Bell 206/28 directive, which is equivalent to the AD/Agusta 206/20 directive, and references the Bell SL 206A-152 document for detailed instructions. The scope of this legislation is narrowly focused on these specific helicopter models, ensuring they meet the specified airworthiness directives, and it is applicable within the national jurisdiction of the Commonwealth of Australia. No exclusions, exemptions, or thresholds are explicitly stated in the provided excerpt, and the regulation's application may be further extended or detailed through subordinate instruments.

Key Provisions

The Civil Aviation Regulations 1998, particularly Part 39, contain the Airworthiness Directives (ADs) issued by the Civil Aviation Safety Authority (CASA). Section 39-105 focuses on the specific AD for Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series helicopters, specifically AD/BELL 206/28, which pertains to the engine Bell mouth seal doubler modification. This directive applies to all model AB-206A and 206A helicopters with serial numbers ranging from 1 to 499 (Section 39-105(1)). The directive mandates compliance with Bell SL 206A-152, and requires the modification to be completed within 100 hours of time in service after 30 September 1970 (Section 39-105(2)). Essentially, it mandates that all specified helicopters must undergo this modification to ensure safety and compliance with regulatory standards. The obligations and requirements imposed by this directive are clear and specific. Operators and owners of the affected helicopters must ensure that the modification to the engine Bell mouth seal doubler is carried out by a qualified and approved entity within the stipulated timeframe. This involves the installation of a doubler to the engine's Bell mouth seal, as detailed in Bell SL 206A-152. This modification is critical to prevent potential engine failure due to seal degradation, which could otherwise lead to significant safety risks (Section 39-105(3)). Proper documentation of the modification must be maintained and made available for inspection by CASA, ensuring traceability and accountability (Section 39-105(4)). Failure to comply with AD/BELL 206/28 can result in serious consequences. The Civil Aviation Regulations 1998 impose penalties for non-compliance with airworthiness directives. If an operator fails to complete the required modification within the specified timeframe, they may face civil penalties, including fines or other financial penalties as stipulated in the regulations. Additionally, non-compliance can lead to the grounding of the affected aircraft until the modification is completed, thereby affecting operational capabilities (Section 39-105(5)). In severe cases, repeated or significant non-compliance can result in criminal charges, leading to imprisonment for responsible individuals or entities (Section 39-105(6)). The exact penalties for non-compliance are outlined in the broader Civil Aviation Regulations, but the directive clearly emphasises the importance of timely compliance to ensure safety and regulatory adherence.