AD/BEA 121/23 - Engine Mounting Structure

Overview

The Civil Aviation Regulations 1998, under Part 39, encompasses various regulations and directives aimed at maintaining airworthiness standards in Australia. Specifically, AD/BEA 121/23 addresses concerns regarding the engine mounting structure of Beagle B121 (Pup) series aeroplanes, targeting aircraft that have accrued 1000 hours of time in service. The directive was introduced to mitigate the risk posed by engine mount cracking, as reported by the manufacturer, British Aerospace (Scottish Division). The objective is to ensure ongoing safety and compliance by mandating inspections within 50 hours of service after 27 August 1979, and at intervals not exceeding 50 hours thereafter, as specified in British Aerospace SB No. B121/81. This legislative instrument is enacted by the Civil Aviation Safety Authority, under the authority of the Commonwealth of Australia, to address a critical safety concern within the aviation industry.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, under the Civil Aviation Safety Authority Schedule of Airworthiness Directives, pertains to the safety requirements for Beagle B121 (Pup) Series Aeroplanes, particularly addressing engine mounting structure concerns. This legislation applies to all Beagle B121 series 1 and 2 aeroplanes that have accumulated 1000 hours of operational time. The directive mandates adherence to the specifications outlined in British Aerospace (Scottish Division) Service Bulletin No. B121/81, which was issued to address reported cases of engine mount cracking. Compliance with these regulations requires inspections to be conducted within 50 hours of operational time following 27 August 1979 and subsequently at intervals not exceeding 50 hours of operational time. This ensures ongoing safety and operational reliability of the specified aircraft models within the Australian airspace. The regulations are enforced under the Commonwealth of Australia and extend to all relevant operators and entities involved in the maintenance and operation of these aircraft.

Key Provisions

The Civil Aviation Regulations 1998, specifically in Part 39 under the Civil Aviation Safety Authority (CASA) schedule of Airworthiness Directives, detail essential safety requirements for various aircraft, including the Beagle B121 (Pup) series aeroplanes. Section 39-105 addresses a specific airworthiness directive (AD/BEA 121/23) for the Beagle B121 aeroplanes. This directive (paragraph 10/79) applies to all Beagle B121 series 1 and 2 aeroplanes that have achieved 1000 hours of time in service. The directive mandates compliance with British Aerospace (Scottish Division) Service Bulletin No. B121/81 to address issues with engine mounting structure, particularly engine mount cracking. The obligation under AD/BEA 121/23 (paragraph 10/79) is for the operators of affected Beagle B121 aeroplanes to inspect the engine mounting structure within 50 hours of time in service following 27 August 1979. After the initial inspection, subsequent inspections must occur at intervals not exceeding 50 hours of time in service. This regular inspection requirement is critical to ensure the continued airworthiness of the aeroplanes, as it directly addresses the identified issue of engine mount cracking, which could otherwise lead to serious safety concerns. Failure to comply with the provisions of AD/BEA 121/23 could result in serious consequences. Non-compliance with airworthiness directives can lead to civil or criminal penalties, as outlined in other sections of the Civil Aviation Regulations. Specifically, under section 91.215 of the Civil Aviation Act 1988, a person who contravenes a regulation or direction issued under the Act can face significant penalties. For corporations, the maximum penalty can be up to 10,000 Australian penalty units, while for individuals, the maximum penalty can be up to 1,000 Australian penalty units, along with potential imprisonment. These stringent penalties underscore the importance of adhering to CASA's directives to maintain the highest safety standards in civil aviation.