Overview

The Civil Aviation Regulations 1998, enacted by the Commonwealth of Australia, aim to ensure the safety and regulation of civil aviation within the country. The regulations are periodically updated to address emerging safety concerns and technological advancements. One such update is the Airworthiness Directive AD/CESSNA 185/11, which specifically addresses the installation and maintenance of non-return valves in the electric fuel pump bypass line of Cessna 185 series aeroplanes. This directive was introduced to mitigate the risk of fuel system malfunctions that could potentially lead to in-flight failures or accidents. The objective of this directive is to ensure that all applicable Cessna 185 series aeroplanes comply with specified safety standards by either modifying or replacing the non-return valves as stipulated. This regulation underscores the importance of maintaining stringent safety protocols in civil aviation to protect both passengers and crew.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to the maintenance and safety directives issued by the Civil Aviation Safety Authority (CASA) regarding aircraft airworthiness. This particular directive, AD/CESSNA 185/11, applies to all Cessna 185 Series aeroplanes that are equipped with a dual Bendix auxiliary fuel pump installation. The regulation mandates that these aircraft must comply with specific requirements concerning the electric fuel pumps bypass non-return valve to ensure safety and operational integrity. The directive includes detailed steps for identifying, testing, modifying, or replacing the non-return valve, depending on the manufacturer's part number, to ensure that the opening pressure does not exceed 8 inches of water. Compliance with these directives is mandatory for all affected aircraft manufactured before 1 January 1967. This regulation has a national reach within Australia and is enforced by CASA, with compliance monitored and overseen by relevant aviation authorities.

Key Provisions

The key sections of this legislative instrument (AD/CESSNA 185/11) require the identification and modification or replacement of non-return valves in the electric fuel pump bypass line of Cessna 185 Series aeroplanes with a dual Bendix auxiliary fuel pump installation (section 1). Specifically, section 2 requires that if the non-return valve is of a particular type (Republic Manufacturing Company P/N 485-6D-1), it must either be modified or replaced. For all other types of non-return valves, they must be tested in situ to ensure they are functioning correctly (section 3). If a valve is found to be defective, it must be rectified or replaced. Additionally, if the non-return valve is the specified type, it must be modified to ensure that its opening pressure does not exceed 8 inches of water, and it must be permanently marked to indicate this (section 4). Alternatively, the specified valve can be replaced with a valve from either Parker Aircraft Company or Dukes Astronautics, and the system must be reworked in accordance with the attached Figure 1 (section 5). The obligations imposed by this Act include the requirement for aircraft operators and maintenance personnel to ensure that all applicable Cessna 185 Series aeroplanes meet the specified airworthiness standards. This involves identifying the electric fuel pump bypass non-return valve, testing it if necessary, and either modifying or replacing it as required. If a valve is found to be defective, it must be rectified or replaced. Operators and maintenance personnel must also ensure that any modifications or replacements are carried out in accordance with an approved scheme and that any modified or replaced valves are permanently marked to indicate their opening pressure. Compliance with these requirements must be achieved before 1 January 1967. Failure to comply with the provisions of this legislative instrument may result in serious safety implications for the operation of Cessna 185 Series aeroplanes. While the specific penalties for non-compliance are not detailed in this Act, breaches of civil aviation regulations can generally result in significant civil or criminal penalties, including fines and imprisonment. The exact penalties would depend on the nature and severity of the breach, as well as any relevant jurisdictional guidelines. Operators and maintenance personnel are therefore strongly encouraged to ensure full compliance with all requirements to avoid any potential legal consequences.