AD/CESSNA 650/5 - Engine and Flight Data Monitoring

Overview

The Civil Aviation Regulations 1998, specifically Part 39, was enacted to ensure safety standards in civil aviation in Australia. One of the legislative instruments under this regulation is the Airworthiness Directive (AD) for Cessna 650 (Citation III) Series Aeroplanes, issued by the Civil Aviation Safety Authority (CASA). AD/CESSNA 650/5 addresses the problem of uncontained failure of the first stage low pressure turbine disc due to failure of certain low pressure turbine nozzle A5 airseals. This directive was introduced to mandate the monitoring of engine parameters, calculation of recorded data, and specific actions to be taken during engine operation to prevent such failures. The policy objective is to enhance the safety of aircraft operations by ensuring compliance with stringent monitoring and maintenance protocols, as outlined in relevant Federal Aviation Administration (FAA) directives and Civil Aviation Orders (CAO). Compliance with these directives is mandatory and must be achieved prior to further flight.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to the application of Airworthiness Directives (ADs) for aircraft, including the Cessna 650 series aeroplanes fitted with certain engines. This legislative instrument mandates that operators of the Cessna 650 series aircraft equipped with AlliedSignal TFE731-3 series engines, which do not incorporate the specific service bulletin TFE731-72-3509, must adhere to the outlined requirements to ensure continued airworthiness and safety. Compliance with these regulations is mandatory and applies on a national level, overseen by the Civil Aviation Safety Authority (CASA). The directive demands modifications to the Airplane Flight Manual, data calculations, and specific monitoring actions as stipulated, with a focus on preventing uncontained engine failures. Compliance must be achieved before further flight, and the directive was effective from 14 September 1994.

Key Provisions

The Civil Aviation Regulations 1998, Part 39 - 105, specifically the Airworthiness Directive (AD) concerning the Cessna 650 (Citation III) Series Aeroplanes, outlines key requirements for aircraft fitted with certain engines. AD/CESSNA 650/5, focuses on engine and flight data monitoring, applicable to aircraft with AlliedSignal TFE731-3 series engines not incorporating AlliedSignal Service Bulletin TFE731-72-3509. This directive mandates several actions to ensure safety and compliance. Firstly, it requires the amendment of the Airplane Flight Manual (AFM) to incorporate FAA Airworthiness Directive 94-07-03, specifically paragraphs (a), (1), (2), (3), and (4), using AFM amendment A/C650/9. Secondly, operators must calculate the data recorded in accordance with FAA AD 94-07-03, paragraph (b), (1). Thirdly, actions must be taken as per FAA AD 94-07-03, paragraph (b), (2). Lastly, further actions are stipulated under FAA AD 94-07-03, paragraph (c). Compliance with CAO 106, AD/TFE731/25 on both engines serves as a terminating action for the requirements outlined in this directive. The obligations imposed by this directive on the operators and owners of the affected Cessna 650 aircraft are stringent. They must ensure that the AFM is updated to reflect the specified FAA AD requirements. This involves precise calculations of recorded engine data and monitoring procedures during engine start and after shutdown. Operators must also adhere to specific actions as outlined in the FAA AD, ensuring that all necessary steps are taken to mitigate the risk of uncontained engine failure. Additionally, compliance with CAO 106, AD/TFE731/25 on both engines acts as a final measure to ensure all previous requirements are met. Failure to comply with the provisions of this Airworthiness Directive can result in serious consequences. Non-compliance prior to further flight after the effective date of 14 September 1994 can lead to severe penalties. The specific penalties for breach are not detailed within the directive itself, but generally, such breaches can lead to civil or criminal charges, substantial fines, and potential grounding of the aircraft until compliance is achieved. The severity of the penalties reflects the critical nature of the directive in maintaining aviation safety standards.