Overview

The Civil Aviation Regulations 1998, enacted by the Australian Government, provide a comprehensive framework for the regulation of civil aviation, with a particular focus on ensuring the safety of aircraft operations. One specific aspect of these regulations is the issuance of Airworthiness Directives (ADs) by the Civil Aviation Safety Authority (CASA), which is the body responsible for enforcing these regulations. The AD for the Cessna 180, 182, and Wren 460 Series Aeroplanes addresses a critical safety issue identified with certain oil pressure switches in these aircraft models, which could potentially lead to engine failure if not rectified. The policy objective behind issuing this AD is to mandate specific corrective actions to eliminate the unsafe condition and ensure the continued airworthiness of affected aircraft, thereby enhancing aviation safety. This particular Airworthiness Directive was introduced to address the problem of oil pressure switch failures in certain Cessna 182S model aeroplanes, which could result in a loss of engine oil pressure and subsequent engine failure. The AD mandates the inspection and, if necessary, the replacement of oil pressure switches with specific part numbers to mitigate this risk. The directive was issued under subregulation 39.1 (1) of the Civil Aviation Regulations 1998, and it became effective on 8 March 2000. The requirement for compliance with this AD includes inspecting the oil pressure switch within the next 25 hours of time in service from the effective date of the directive, and replacing any defective switches before further flight. This measure aims to ensure that the unsafe condition is corrected promptly, thereby maintaining the safety standards required by the Civil Aviation Regulations.

Scope and Application

The Civil Aviation Regulations 1998, under the jurisdiction of the Commonwealth of Australia and administered by the Civil Aviation Safety Authority (CASA), include a specific Airworthiness Directive concerning certain Cessna aeroplanes. This AD applies to Cessna 182S model aeroplanes with serial numbers ranging from 18280001 through 18280660. The directive mandates inspection and, if necessary, replacement of the oil pressure switch in accordance with the instructions provided. The primary objective of this directive is to address the potential unsafe condition arising from failures of oil pressure switch diaphragms, which could lead to loss of engine oil and consequently partial or complete loss of engine power. The AD requires compliance within a specified timeframe, with certain actions needing to be completed before further flight and others taking effect immediately upon the directive's publication. This directive, issued under subregulation 39.1 (1) of the Civil Aviation Regulations 1998, is a specific measure to enhance the safety of the mentioned aircraft models by ensuring the correct installation of airworthy components.

Key Provisions

The Civil Aviation Regulations 1998, specifically in PART 39 - 105, establish the requirements for Airworthiness Directives, which in this instance concern the Cessna 180, 182 and Wren 460 Series Aeroplanes. Section 39.1 (1) empowers the delegate of the Civil Aviation Safety Authority (CASA) to issue Airworthiness Directives (AD) when necessary to correct unsafe conditions. The AD in question (AD/CESSNA 180/80) pertains to the inspection and replacement of oil pressure switches in certain Cessna 182S model aeroplanes. This requirement is outlined in the applicability section, which specifies that the directive applies to Cessna 182S model aeroplanes with serial numbers ranging from 18280001 through 18280660. The AD mandates specific actions to be taken by operators of the affected aircraft. Firstly, operators must inspect the oil pressure switch in accordance with Cessna Service Bulletin SB00-79-01 dated 31 January 2000 to determine if the installed switch is part number (P/N) 77041 (or an approved equivalent P/N) or P/N 83278 (or an approved equivalent P/N). If the installed switch is P/N 83278, no further action is necessary. However, if P/N 77041 (or an approved equivalent P/N) is installed, it must be replaced with a P/N 83278 (or an approved equivalent P/N). Moreover, P/N 77041 (or an approved equivalent P/N) oil pressure switches must not be installed on any aeroplane. The compliance timeframes for these requirements are specified, with inspections needing to be completed within the next 25 hours of the AD's effective date, replacements performed before further flight, and the prohibition on installing P/N 77041 (or an approved equivalent P/N) switches taking effect immediately upon the AD's effective date. Operators of the affected Cessna 182S model aeroplanes must adhere to the requirements outlined in the AD to ensure compliance with aviation safety standards. Failure to comply with the AD may result in serious safety implications, including potential engine failure due to loss of oil pressure, which could lead to partial or complete loss of engine power. The AD was issued in response to reports of oil pressure switch diaphragm failures, which could result in such dangerous conditions. The directive references FAA AD 2000-04-01 Amdt 39-11583 for additional context. Non-compliance with the AD may result in serious consequences, including potential penalties and enforcement actions. While the specific penalties for non-compliance are not detailed within the AD itself, general aviation regulations and safety directives often include provisions for fines, suspension of airworthiness certificates, and other enforcement actions. The severity of the consequences can depend on the extent of non-compliance and the impact on aviation safety. Therefore, it is crucial for operators to carefully follow the AD's requirements to avoid these potential repercussions.