AD/BELL 206/56 Amdt 1 - Starter Generator Retaining Clamp T Bolt - Inspection

Overview

The Civil Aviation Regulations 1998, as amended, include provisions that address various safety directives to ensure the airworthiness of aircraft, particularly helicopters, within Australia. One such directive, AD/BELL 206/56 Amendment 1, pertains specifically to the Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series helicopters, focusing on the inspection of the starter generator retaining clamp 'T' bolt. Enacted to mitigate potential risks associated with the integrity of this critical component, the directive was introduced by the Civil Aviation Safety Authority (CASA), which operates under the Australian Government to regulate and oversee civil aviation safety. The primary objective of this directive is to enhance the safety of helicopter operations by ensuring that the retaining clamp 'T' bolt is regularly inspected and maintained, thereby preventing potential mechanical failures that could compromise flight safety. This legislative instrument underscores the commitment of CASA to proactively address safety concerns through the issuance of airworthiness directives. The requirement for an initial inspection within 10 hours of time in service, followed by repetitive inspections before each flight where the engine is shut down, aims to ensure the ongoing reliability and safety of the affected helicopter models. The directive further clarifies that these inspections can be performed by the pilot, facilitating a streamlined and efficient compliance process. The directive is closely aligned with Bell SB No. 206-03-73-1, Revision A, and its equivalent Agusta SB No. BT206-74, ensuring that maintenance protocols are consistent and comprehensive.

Scope and Application

The Civil Aviation Regulations 1998, administered by the Civil Aviation Safety Authority (CASA) under the Commonwealth of Australia, encompass various regulations governing civil aviation safety. Specifically, Part 39 - 105 pertains to the Schedule of Airworthiness Directives, which includes directives applicable to aircraft manufacturers and operators to ensure the continued safety of aircraft in operation. One such directive, AD/BELL 206/56 Amendment 1, pertains to the inspection of the starter generator retaining clamp ‘T’ bolt for Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters. This directive applies to all models of these helicopters prior to serial number 1234 and mandates an initial inspection within 10 hours of time in service. Following this initial inspection, the directive requires further inspections prior to each flight where the engine is shut down until the modified bolt is installed. The inspections may be conducted by the pilot, ensuring ongoing compliance with safety standards. The directive references Bell Service Bulletin No. 206-03-73-1, Revision A, and notes an equivalent Agusta Service Bulletin, BT206-74. The regulations are designed to maintain airworthiness and ensure the safety of aviation operations within the Commonwealth of Australia.

Key Provisions

The Civil Aviation Regulations 1998, particularly under Part 39, section 105, includes an Airworthiness Directive (AD) concerning Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters. The directive, AD/BELL 206/56 Amendment 1, focuses on the inspection of the Starter Generator Retaining Clamp ‘T’ Bolt. This directive applies to all models prior to serial number 1234, as referenced in Bell Service Bulletin No. 206-03-73-1, Revision A, and Agusta Service Bulletin No. BT206-74. According to the directive, the initial inspection of the Starter Generator Retaining Clamp ‘T’ Bolt must be performed within 10 hours of the helicopter being placed in service. Following this initial inspection, the bolt must be inspected before each flight where the engine is shut down until the modified bolt is fitted. Importantly, the repetitive inspections can be conducted by the helicopter pilot. This requirement is aimed at ensuring the ongoing airworthiness and safety of the helicopter by identifying any potential issues with the retaining clamp ‘T’ bolt early. Entities governed by this directive, including operators and owners of the specified Bell and Agusta helicopters, are obligated to comply with the inspection requirements as stipulated. This includes ensuring that the initial and repetitive inspections are performed accurately and in a timely manner to maintain compliance with aviation safety standards. Failure to adhere to these inspection requirements can result in the aircraft being deemed unairworthy, potentially leading to grounding of the helicopter until the necessary inspections are completed and any issues are resolved. In the event of non-compliance with the AD/BELL 206/56 Amendment 1, there may be civil or criminal consequences. While the specific penalties are not detailed in the provided text, general provisions within the Civil Aviation Regulations 1998 may impose fines or other sanctions. Additionally, non-compliance with airworthiness directives can result in enforcement actions by the Civil Aviation Safety Authority, which may include the imposition of penalties and, in severe cases, prosecution under civil or criminal law.