AD/PA-46/23 Amdt 1 - Vacuum Gauge Marking

Overview

The Civil Aviation Regulations 1998, established by the Commonwealth of Australia's Parliament, provide a comprehensive regulatory framework for ensuring the safety of civil aviation. Specifically, Part 39 - 105 of these regulations includes directives aimed at maintaining the airworthiness of aircraft. One such directive, AD/PA-46/23 Amendment 1, pertains to Piper PA-46 Malibu series aeroplanes. This directive was introduced to address the problem of in-flight vacuum system failures in certain Malibu aircraft models, which could lead to undetected issues and subsequent failures of critical systems such as the air-driven attitude gyro and autopilot systems. The policy objective is to enhance safety by ensuring that such failures can be detected early, thereby mitigating risks associated with unmonitored vacuum system issues. The specific requirement outlined in the directive is the installation of vacuum gauge markings as detailed in Piper Service Bulletin 947A dated 29 October 1991, with the aim of correcting a typographical error that previously limited the applicability of the directive. The directive mandates compliance within 100 hours of time in service from 16 September 1993, building upon the initial compliance period set by the Federal Aviation Administration (FAA) on 17 September 1992. This amendment seeks to ensure that the affected aircraft are equipped with the necessary markings to facilitate the early detection of vacuum system failures.

Scope and Application

This legislative instrument pertains to a specific segment of the Civil Aviation Regulations 1998, focusing on ensuring the airworthiness of Piper PA-46 Malibu series aeroplanes. It applies to particular models within this series: the PA-46-310P Malibu aircraft serial numbers 46-8408001 to 46-8608067 inclusive and 4608001 to 4608140 inclusive, as well as the PA-46-350P Malibu Mirage aircraft serial numbers 4622001 to 4622118 inclusive. The requirement outlined in this amendment mandates the installation of a vacuum gauge marking as specified in Part II of Piper Service Bulletin 947A dated 29 October 1991, which aligns with FAA AD 92-15-14. The amendment corrects a previous oversight in the applicability statement, ensuring the directive now accurately reflects the intended serial numbers. Compliance with this directive must occur within 100 hours of time in service from 16 September 1993, addressing the issue of in-flight vacuum system failures that could otherwise lead to undetected failures of the air-driven attitude gyro and autopilot systems.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, include an Airworthiness Directive (AD) concerning Piper PA-46 (Malibu) series aeroplanes, identified as AD/PA-46/23 Amendment 1 (AD/PA-46/23 Amdt 1). This AD mandates the installation of vacuum gauge markings for certain Malibu aircraft models, namely PA-46-310P serial numbers 46-8408001 to 46-8608067 inclusive and 4608001 to 4608140 inclusive, and PA-46-350P Malibu Mirage serial numbers 4622001 to 4622118 inclusive. The directive requires compliance in accordance with Part II of Piper Service Bulletin 947A dated 29 October 1991, with reference to FAA AD 92-15-14. The purpose of this directive is to ensure that the vacuum gauge markings are installed correctly to facilitate early detection of vacuum system failures, thus preventing potential failures of the air-driven attitude gyro and autopilot systems due to undetected low vacuum. The AD imposes specific obligations on the parties and entities governed by this regulation. Aircraft owners, operators, and maintenance providers must ensure that the specified Malibu aircraft models are inspected to confirm their serial numbers fall within the applicable range. If applicable, they must install the vacuum gauge markings as detailed in Piper Service Bulletin 947A. Compliance must be achieved within 100 hours of time in service from 16 September 1993, an amendment to the previous compliance period that ended 100 hours from 17 September 1992. The directive also requires that all modifications be logged appropriately in the aircraft maintenance records. Failure to comply with the AD/PA-46/23 Amdt 1 can lead to various consequences, including potential penalties. Although the specific penalties are not detailed in the text provided, non-compliance with Civil Aviation Regulations can typically result in civil penalties, such as fines or sanctions against the aircraft operator. In severe cases, non-compliance could also lead to criminal charges if it is determined that the failure to comply contributed to an aviation incident or accident. Additionally, non-compliant aircraft may be grounded until the necessary modifications are made, which can disrupt operational schedules and potentially incur additional costs for the operator. The gravity of the consequences underscores the importance of adhering to the AD's requirements to ensure continued airworthiness and safety.