AD/M20/40 - Oil Pressure Transducer Installation - Modification

Overview

The Civil Aviation Regulations 1998, under Part 39 – 105, address the critical safety issues associated with the Mooney M20 Series Aeroplanes, specifically targeting the oil pressure transducer installation. Enacted by the Australian Parliament, this regulation was introduced to ensure that the Mooney M20J model with specific serial numbers complies with safety standards to prevent potential oil loss, which could lead to catastrophic engine failure. The policy objective is to maintain the airworthiness of these aircraft by mandating a modification to the oil pressure transducer installation, ensuring adequate clearance and preventing the transducer from chafing through the engine mount. Compliance with the directive is required within 100 hours of time in service after 30 November 1980, with documented evidence provided by Mooney SB M20-221.

Scope and Application

The Civil Aviation Regulations 1998, specifically under Part 39 - 105, mandate the application of Airworthiness Directives (AD) to ensure the safe operation of civil aircraft within Australian airspace. The Mooney M20 Series Aeroplanes Airworthiness Directive AD/M20/40 pertains to specific Mooney M20J models with serial numbers within the specified range, aiming to address the risk of the oil pressure transducer chafing through the upper right-hand engine mount, which could lead to catastrophic engine failure. This directive applies to aircraft operators who must comply with the outlined modifications within 100 hours of time in service following 30 November 1980. The regulatory scope encompasses the named Mooney M20J models, ensuring that only these aircraft are subject to the requirements of this particular AD. The geographic reach of this regulation is national, as it applies to all aircraft registered in Australia that fall within the specified model and serial number criteria. No exclusions or exemptions are explicitly stated in the text, suggesting that all applicable aircraft must adhere to the directive to maintain their airworthiness status. The AD may be further clarified or expanded through subordinate instruments issued by the Civil Aviation Safety Authority, ensuring compliance and safety standards are consistently upheld across the industry.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, includes Airworthiness Directives (ADs) that govern the maintenance and operational standards of aircraft. One such AD, AD/M20/40, pertains to the Mooney M20 Series aeroplanes and addresses the installation modification of the oil pressure transducer. This AD applies to Mooney M20J aircraft with serial numbers ranging from 24-0084 to 24-0946 (section 9/80). The directive was issued following reports that inadequate clearance between the oil pressure transducer housing and the upper right-hand engine mount could lead to the transducer chafing through, potentially resulting in a loss of all engine oil. The primary requirement of AD/M20/40 is that the specified Mooney M20J aeroplanes must undergo a modification to the oil pressure transducer installation within 100 hours of time in service after 30 November 1980. This modification is to be performed in accordance with the instructions provided in Mooney Service Bulletin M20-221 (section 9/80). The objective of this directive is to mitigate the risk of engine failure due to oil loss, thereby ensuring the continued airworthiness and safety of the aircraft. Compliance with AD/M20/40 imposes certain obligations on the aircraft owners, operators, and maintenance providers. These parties must ensure that the required modification to the oil pressure transducer installation is performed by a licensed aircraft maintenance engineer within the specified timeframe. Additionally, the person in charge of the aircraft must ensure that all relevant records are updated to reflect the modification and that the aircraft is not operated until the required modifications have been completed and documented appropriately. This ensures that all parties involved are aware of the modifications and their importance in maintaining the aircraft's airworthiness. Failure to comply with the provisions of AD/M20/40 may result in significant civil and criminal consequences. Under the Civil Aviation Act 1988, non-compliance with an AD may result in the grounding of the aircraft, denial of airworthiness certification, and potential fines. Additionally, operators or maintenance personnel found to be in breach of the AD may face prosecution, with penalties including substantial fines and imprisonment, depending on the severity and intent of the breach. The specific maximum penalties are not detailed in the legislative instrument but are governed by the overarching Civil Aviation Act 1988 and related regulations.