AD/BEECH 55/78 - Fuel Crossfeed Check Valves

Overview

The Civil Aviation Regulations 1998, which were enacted by the Commonwealth of Australia, address a range of safety issues in the operation of civil aircraft within Australian airspace. One such regulation, found in Part 39, addresses the issuing of airworthiness directives to ensure that aircraft meet specific safety standards. This regulatory framework was developed to fill the gap in ensuring that civil aircraft are maintained and operated in a manner that minimises the risk of accidents and enhances overall aviation safety. The policy objective behind these regulations is to mandate safety standards that are designed to prevent accidents and incidents, thereby protecting the lives of passengers, crew, and the general public. One specific example of this legislative approach is the airworthiness directive AD/BEECH 55/78 concerning Beechcraft 55, 58, and 95-55 (Baron) series aeroplanes. This directive was introduced in response to reports of excessive force being required to operate the fuel selector valve due to potential fuel pressure build-up in the crossfeed valves, particularly under increased temperature conditions. The directive mandates that all affected aircraft, specifically those model 58 and 58A aircraft with certain serial numbers, must comply with the action specified in Beech mandatory Service Bulletin No 2454, with an effective date of 16 April 1993. This legislative measure ensures that the identified safety issue is addressed, thereby maintaining the airworthiness of the affected aircraft and contributing to the broader goal of enhancing aviation safety.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, mandates that the Airworthiness Directives apply to all model 58 and 58A Beechcraft 55, 58, and 95-55 (Baron) Series aeroplanes with specific serial numbers as outlined. This legislative instrument is enacted under the Commonwealth of Australia and overseen by the Civil Aviation Safety Authority. The directive necessitates compliance with Beech mandatory Service Bulletin No 2454 and references FAA AD 93-01-23 Amendment 39-8477. The requirement is to ensure that the fuel crossfeed check valves are addressed to prevent issues related to excessive force needed to operate the fuel selector valve, which can be caused by fuel pressure build-up due to increased temperature. The effective compliance date for this directive is 16 April 1993, as revised. The scope of the directive is geographically and jurisdictionally confined to the Commonwealth of Australia, and it specifically targets aircraft within the mentioned series and serial numbers.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39, Section 105, establish the regulatory framework for airworthiness directives concerning various aircraft models, including the Beechcraft 55, 58, and 95-55 (Baron) series aeroplanes. Section AD/BEECH 55/78 pertains to the Beechcraft 58 and 58A aircraft with serial numbers TH-1488, TH-1600, TH-1613 through TH-1635, and TH-1638 through TH-1662. This directive requires compliance with Beech mandatory Service Bulletin No. 2454, which addresses the issue of potential fuel pressure build-up in the cross feed valves due to increased temperature. Operators must perform the necessary actions as outlined in the requirement document, with a revised effective date of 16 April 1993, referencing FAA AD 93-01-23 Amendment 39-8477. The obligations under this airworthiness directive include ensuring that all specified aircraft undergo a thorough inspection and repair of the fuel crossfeed check valves to mitigate the risk of excessive force required to operate the fuel selector valve. Operators are mandated to follow the detailed instructions provided in the requirement document to address this issue. Compliance involves a rigorous adherence to the specified timelines and procedures, ensuring that the modifications are completed by the revised effective date to maintain the airworthiness of the aircraft. Failure to comply with the provisions of AD/BEECH 55/78 may result in serious safety implications, including potential in-flight fuel system failures. The regulations impose both civil and criminal consequences for non-compliance. Civil penalties can include substantial fines, while criminal penalties may extend to imprisonment, depending on the severity of the breach and its impact on aviation safety. The maximum penalties are determined in accordance with the Civil Aviation Act 1988 and related legislative instruments, reflecting the critical importance of adhering to airworthiness directives to ensure the safety and reliability of air travel.