AD/PA-23/83 - Heater Fuel Regulator Valve Shroud - Drain Modification

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105, was enacted to establish and enforce standards for the airworthiness of aircraft operating in Australia. This legislation aims to ensure that all civil aircraft meet specific safety criteria, thereby safeguarding the public and maintaining the integrity of the aviation industry. The Civil Aviation Safety Authority (CASA) is the body responsible for administering and enforcing these regulations, with the overarching policy objective being to maintain and enhance aviation safety standards. One such directive, AD/PA-23/83, addresses a safety concern identified in Piper PA-23 (Apache and Aztec) series aeroplanes, specifically those equipped with a Janitrol heater. This directive mandates a modification to the heater fuel regulator valve shroud to prevent fuel leakage, which was reported in certain serial number ranges. Compliance with this directive is required within 100 hours of time in service after 31 July 1982, as per Piper Service Bulletin No. 721.

Scope and Application

The Civil Aviation Regulations 1998, as amended, pertain to the operation of aircraft within the Australian Commonwealth. Specifically, Part 39 - 105 of the regulations, which includes the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, applies to the Piper PA-23 series aeroplanes, including the Apache and Aztec models. The directive AD/PA-23/83 concerns all PA-23-250 models with specific serial numbers (27-3050, 27-3154 to 27-8154015) that are equipped with a Janitrol heater installation. The directive mandates compliance with modifications to the heater fuel regulator valve shroud, specifically the drain modification, within 100 hours of time in service after 31 July 1982, following a documented report of fuel leakage into the fuselage nose compartment as per Piper Service Bulletin No. 721. This regulation extends to ensuring that the specified models are maintained to the standards outlined by CASA to uphold the safety of civil aviation within Australia.

Key Provisions

The Civil Aviation Regulations 1998, specifically in Part 39, Section 105, mandates the Civil Aviation Safety Authority (CASA) to issue airworthiness directives, as evidenced by AD/PA-23/83. This directive pertains to Piper PA-23 (Apache and Aztec) series aeroplanes, addressing a modification to the heater fuel regulator valve shroud to prevent a drain issue. Section 105 of the Regulations empowers CASA to ensure the continued airworthiness of aircraft by issuing such directives, which are legally binding on the aircraft operators and owners. These directives must be adhered to within specified timeframes to maintain the safety standards of the aircraft. Under this directive, the specific models affected are PA-23-250 with serial numbers ranging from 27-3050 to 27-815415, provided they have a Janitrol heater installation. Compliance with this directive is mandatory, as outlined in the document Piper SB No. 721. Operators and owners of these aircraft must ensure that the modifications to the heater fuel regulator valve shroud are completed within 100 hours of time in service after 31 July 1982. Failure to comply with this directive could result in the aircraft being deemed unairworthy. Failure to comply with the requirements set out in AD/PA-23/83 may result in serious consequences. Firstly, the aircraft may be grounded until the necessary modifications are made, leading to operational disruptions and potential financial losses for the operator. Furthermore, CASA has the authority to impose penalties for non-compliance, which can include fines or other administrative actions. In severe cases, operators may face criminal charges if the non-compliance is found to have contributed to an accident or incident, potentially leading to imprisonment or additional financial penalties. The penalties for non-compliance with AD/PA-23/83 are intended to enforce the importance of adhering to airworthiness directives. For instance, under the Civil Aviation Act 1988, operators found in breach of airworthiness directives may face fines of up to $200,000 for a body corporate and $40,000 for an individual. Additionally, CASA can issue a Notice of Unauthorized Modification (NUM) which can lead to further legal action and potential criminal charges if the unauthorised modification is found to compromise the safety of the aircraft. These stringent measures underscore the critical nature of maintaining the airworthiness of aircraft as per the directives issued by CASA.