AD/PA-46/7 - Oxygen System Electrical Wiring Rerouting

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105, introduces Airworthiness Directives to ensure the safety and reliability of civil aircraft operating in Australian airspace. This particular directive, AD/PA-46/7, targets Piper PA-46 (Malibu) series aeroplanes and mandates the rerouting of oxygen system electrical wiring to prevent inadvertent illumination of the oxygen system annunciator light. This problem arises due to electrical wiring chafing against the right-hand centre seat base bracketry and aileron cables beneath the oxygen bottle drawer. The directive applies to all models PA-46-310P within the specified serial number range and requires compliance within 100 hours of time in service after 31 December 1984, in accordance with Piper Service Bulletin No 791. The policy objective is to enhance the safety of aircraft operations by addressing a specific technical issue that could compromise the functionality of the oxygen system. The Civil Aviation Regulations 1998, enacted by the Australian Government, serve to maintain and improve civil aviation safety through detailed regulatory standards. This legislative instrument is an example of the ongoing commitment to safety, driven by the Civil Aviation Safety Authority (CASA). By addressing specific issues such as the inadvertent illumination of the oxygen system annunciator light in Piper PA-46 series aeroplanes, the regulations aim to mitigate risks and ensure the highest safety standards are met. The directive underscores the importance of timely compliance with service bulletins to maintain the airworthiness of aircraft and protect both passengers and crew.

Scope and Application

The Civil Aviation Regulations 1998, as outlined in the Schedule of Airworthiness Directives, apply to specific models of Piper PA-46 (Malibu) series aeroplanes, namely those with serial numbers ranging from 46-8408001 to 46-8408035 and 46-8408038 to 46-8408040. This legislation falls under the purview of the Civil Aviation Safety Authority and mandates adherence to the requirements set forth by Piper Service Bulletin No 791. The directive specifically pertains to the oxygen system electrical wiring rerouting to prevent inadvertent illumination of the oxygen system annunciator light, which has been attributed to electrical wiring chafing against the right-hand centre seat base bracketry or the aileron cables near the oxygen bottle drawer. Compliance with this directive is mandatory within 100 hours of time in service after 31 December 1984. This regulation applies across the Commonwealth of Australia, ensuring uniformity in aviation safety standards nationwide. The scope is limited to the specified serial numbers and does not extend to other models or series of aircraft unless explicitly mentioned in subsequent amendments or directives.

Key Provisions

The key provisions of the Civil Aviation Regulations 1998, specifically under Part 39 - 105 concerning the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives for the Piper PA-46 (Malibu) Series Aeroplanes, include the requirement for certain models to adhere to a specific oxygen system electrical wiring rerouting directive. This is detailed in AD/PA-46/7 (paragraph 12/84). The directive applies to all models of the PA-46-310P series with serial numbers ranging from 46-8408001 to 46-8408035 and 46/8408038 to 46-8408040 (paragraph 1). The requirement is to follow Piper Service Bulletin No 791, which outlines the necessary rerouting of electrical wiring to prevent inadvertent illumination of the oxygen system annunciator light caused by contact and chafing of the wiring with the right hand centre seat base bracketry and/or the aileron cables located below the oxygen bottle drawer (paragraph 1). The obligations imposed by this directive are clear and specific. Operators of the affected Piper PA-46 models must ensure that the electrical wiring rerouting as per Piper Service Bulletin No 791 is completed. This compliance must be achieved within 100 hours of time in service after 31 December 1984 (paragraph 1). The directive aims to address safety concerns arising from the inadvertent illumination of the oxygen system annunciator light, which could potentially lead to operational hazards. Operators must adhere to these requirements to maintain the airworthiness of the aircraft and ensure compliance with CASA standards. Failure to comply with the provisions outlined in AD/PA-46/7 can result in various consequences. The Civil Aviation Regulations 1998 do not explicitly state penalties within the provided excerpt; however, non-compliance with CASA directives generally can lead to enforcement actions. These may include fines, operational restrictions, or even the grounding of the aircraft until compliance is achieved. The severity of the consequences may vary depending on the nature and extent of the non-compliance, but operators are expected to take all necessary measures to ensure adherence to the specified safety directives.