AD/AMD 50/2 - Booster Pump Crossfeed Valve Actuators

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of the Commonwealth of Australia, represent a critical framework designed to ensure the safety and efficiency of civil aviation within the country. One of the amendments introduced under this Act is the Airworthiness Directives, which address specific issues and safety concerns associated with particular aircraft models. For instance, AD/AMD 50/2 pertains to the booster pump crossfeed valve actuators in AMD Falcon 50 and 900 Series aeroplanes, particularly addressing the issue of water entrapment in the Aviac actuators that can lead to failures in the booster crossfeed valve. This directive was introduced to ensure compliance and mitigate the risk of engine feed system failures, thereby enhancing overall aviation safety. The policy objective of these directives is to maintain the highest standards of airworthiness, ensuring that aircraft remain safe and reliable for operation. The Civil Aviation Safety Authority (CASA) plays a pivotal role in enforcing these directives, ensuring that all applicable aircraft meet the necessary safety standards before further flight. The requirement for compliance with Service Bulletin AMD/BA F50-182 and Bureau Veritas AD 86-55-4 (B) underscores the collaborative approach between regulatory bodies and aircraft manufacturers to address and resolve identified safety issues. The necessity for compliance before further flight after 30 June 1986 highlights the urgency and importance of addressing these safety concerns promptly to protect both passengers and crew.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, encompasses the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives, including AD/AMD 50/2 which pertains to the Falcon 50 and 900 Series Aeroplanes. This legislation applies to all model AMD Falcon 50 aeroplanes with specific serial numbers as detailed in the directive, mandating that action be taken in accordance with Service Bulletin AMD/BA F50-182. This requirement is necessary to address a safety concern identified with the booster pump crossfeed valve actuators, which had previously caused water entrapment leading to a failure of the booster crossfeed valve. Compliance with these directives is mandatory for all affected aircraft before any further flight after 30 June 1986, as stipulated by Bureau Veritas AD 86-55-4 (B). The scope of this legislation is confined to the specified model aeroplanes and does not extend to other aircraft types or manufacturers unless similarly referenced by other airworthiness directives. This directive is a part of the broader regulatory framework managed by CASA, aimed at ensuring the safety and airworthiness of civil aviation operations within Australia.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, includes a schedule of airworthiness directives that mandate certain actions for the continued safe operation of aircraft. In this case, AD/AMD 50/2 pertains to the booster pump crossfeed valve actuators of the AMD Falcon 50 and 900 series aeroplanes. The directive applies to all model AMD Falcon 50 aeroplanes with serial numbers (S/Nos) 2 to 146, 148 to 158, and 160 to 162 (section 1). This requirement necessitates that action be taken in accordance with Service Bulletin AMD/BA F50-182 (section 2). The directive is referenced in Bureau Veritas AD 86-55-4 (B) (section 3). Under these regulations, the entities governed are required to implement the necessary actions as outlined in Service Bulletin AMD/BA F50-182. This includes addressing the issue of water entrapment in the Aviac actuators, particularly those with part number (P/No) 2773, which has been identified as a source of dormant failure in the booster crossfeed valve. The objective is to ensure that the engine which may experience a failure in its feed system can be adequately supplied with fuel from the feed system of one of the other engines (section 4). Compliance with these directives is mandatory, and aeroplanes must not be flown further after 30 June 1986 until the required actions have been completed (section 5). Failure to comply with these airworthiness directives can result in serious safety issues, as highlighted by the problem of water entrapment in the booster pump crossfeed valve actuators. If an aeroplane is flown without addressing this issue, it may lead to an engine feed system failure, potentially compromising the safety of the flight. The consequences of non-compliance can be severe, including potential civil or criminal penalties. Given the critical nature of the directive, the Civil Aviation Safety Authority (CASA) may impose penalties for non-compliance, although the exact nature and severity of these penalties are not specified in the text provided. It is clear, however, that adherence to these airworthiness directives is essential for ensuring the safe operation of the affected aircraft.