Overview

The Civil Aviation Regulations 1998, enacted by the Commonwealth of Australia, serve to regulate civil aviation within Australia, ensuring safety and compliance across all facets of the industry. A notable legislative instrument under these regulations is the Airworthiness Directive AD/FK-P/7 issued in 2002 by the Civil Aviation Safety Authority (CASA). This directive was introduced to address the problem of excessive wear of drive gears in Franklin model 6A-350-C1R, C1, C2, and 4A-235-B3, B31, B4 engines, which resulted from different hardness specifications in the materials used for the gears. The policy objective of this directive is to mitigate the risk of engine failure by requiring specific maintenance actions, such as ensuring that drive gears are replaced in matched pairs during overhaul, and conducting in-service checks for engines already equipped with mixed sets of gears. This measure aims to maintain the safety and reliability of the aircraft fleet by preventing the mixing of incompatible parts that can lead to premature wear and potential engine failure.

Scope and Application

The Airworthiness Directive issued by the Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998, specifically pertains to the Franklin Piston Engines models 6A-350-C1R, C1, C2, and 4A-235-B3, B31, B4. This directive is designed to address an identified safety issue concerning the excessive wear of drive gears between the oil pump and the camshaft, which can be attributed to variations in the material hardness specifications used by different manufacturers. The directive mandates that corrective actions, as outlined in the WSK-RZESZOW Service Bulletin PZL-F/69/2002, must be undertaken before further flight. This includes an in-service check for engines already equipped with mixed sets of gears, and a requirement for matched pair replacements of gears during engine overhauls. The directive applies across the Commonwealth of Australia and is in effect from 29 November 2002, as gazetted. No specific exclusions or exemptions are mentioned within the directive, but compliance is mandatory for all affected aircraft to mitigate the risk of engine failure due to gear wear.

Key Provisions

The Civil Aviation Regulations 1998, specifically under Part 39, Subpart 106, issue an Airworthiness Directive (AD) numbered AD/FK-P/7 1/2003 TX (section 1). This AD applies to all Franklin model 6A-350-C1R, C1, C2 and 4A-235-B3, B31, B4 engines (section 2(a)). The AD mandates that corrective action must be taken according to the specifications outlined in the WSK-RZESZOW Service Bulletin PZL-F/69/2002 (section 2(b)). This action must be completed before any further flight and the directive is effective from 29 November 2002 (section 2(c)). The directive references an earlier directive issued by the Republic of Poland General Inspectorate of Civil Aviation, SP-0058-2002-B, which addresses the same issue (section 2, Note). The obligations under this AD are clear and specific. All operators of the mentioned engine types must ensure that any mixed sets of drive gears between the oil pump and the camshaft are identified and corrected before any further flight. This involves either a thorough in-service check for engines already in operation or the installation of matched pairs of gears during engine overhauls. Failure to comply with these requirements could result in significant safety risks, including the potential for engine failure during flight (section 2). Operators are required to adhere to the instructions in the referenced service bulletin to ensure compliance with the AD. Breach of the requirements set out in the Airworthiness Directive may have serious consequences. Although the specific penalties are not detailed in the AD itself, violations of Civil Aviation Regulations typically result in significant penalties under Australian law. These can include fines, imprisonment, or both, depending on the severity of the breach and the impact on aviation safety. The exact penalties would be determined by a court, taking into account the specific circumstances of the breach. The overarching aim of the AD is to ensure the safety of aircraft operations by preventing the identified unsafe condition from resulting in accidents or incidents.