AD/PA-34/38 - Exhaust System Heat Exchanger - Inspection

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, aim to regulate aviation safety across the nation. A specific focus of these regulations is ensuring the airworthiness of aircraft through various directives, including the Piper PA-34 (Seneca) Series Aeroplanes AD/PA-34/38. This directive was introduced to address the problem of exhaust system heat exchanger failures in certain models of the Piper PA-34-200 aeroplanes, which could result in significant power loss and potential engine stoppage. The policy objective behind these regulations is to ensure that all aircraft operated within Australian airspace meet stringent safety standards, thereby protecting passengers and crew, as well as maintaining the integrity of the national aviation system. The legislation mandates specific inspections of the exhaust system heat exchanger for affected Piper PA-34-200 models, requiring inspections at certain intervals to mitigate the risk of in-flight failures. This directive underscores the commitment of the Australian government to uphold high safety standards in civil aviation, ensuring that any potential hazards are identified and addressed promptly. By implementing these measures, the Civil Aviation Regulations 1998 aim to foster a safer aviation environment, reflecting a broader policy goal of preventing aviation accidents and incidents.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to the airworthiness directives issued by the Civil Aviation Safety Authority (CASA) for the Piper PA-34 (Seneca) series aeroplanes, addressing exhaust system heat exchanger inspections. This directive applies to all model PA-34-200 aeroplanes with specific serial numbers, namely those ranging from 34-7350342 to 34-7450220 and from 34-7250001 to 34-7350341 that have installed the exhaust system replacement kit 760 764V in accordance with Piper Service Bulletin No. 762. The regulation also references FAA AD 83-14-05, indicating a cross-jurisdictional alignment with the Federal Aviation Administration's directives. Compliance with this airworthiness directive is mandatory, requiring inspections to be conducted on or before 1000 hours of total time in service of the exhaust tailpipes and subsequently at intervals of 100 hours. Additionally, within 100 hours of service after 30th September 1983, inspections must be performed if the in-service hours cannot be established. The inspection criteria must also apply to any replacement tailpipes to ensure ongoing airworthiness and safety. The directive is geographically applicable across the Commonwealth of Australia, administered by CASA, which enforces these safety standards to prevent potential power loss or engine stoppage due to the failure of the heat exchanger inlet port.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39, contains several sections that govern the safety of aircraft operations in Australia. Within this part, section 105 pertains to airworthiness directives, including AD/PA-34/38 which applies to Piper PA-34 (Seneca) Series Aeroplanes. This directive focuses on the inspection of the exhaust system heat exchanger. The regulation requires that specific model PA-34-200 aircraft with certain serial numbers undergo a mandatory inspection of their exhaust tailpipes. The inspection is required at two key points: first, on or before the aircraft's exhaust tailpipes have accumulated 1000 hours of total service time, and then every subsequent 100 hours of service time thereafter (section 1). Additionally, for aircraft that were already in service before 30th September 1983, the inspection must occur within 100 hours of service time after this date if the prior service hours are not established (section 2). The inspection criteria also apply to any replacement tailpipes installed on these aircraft (section 3). The obligations under this directive are clear and specific. Owners and operators of the affected aircraft must ensure that the inspections are carried out by qualified personnel. This includes visually checking the heat exchanger inlet port, cone-shaped deflector, and baffle tube to ensure that there is no damage or separation from the exhaust port of the tailpipe. Any detected issues must be addressed immediately to prevent potential power loss or engine stoppage. The manufacturer's service bulletin, Piper SB No. 762, provides detailed guidance on how these inspections should be performed. Furthermore, operators must maintain accurate records of all inspections and any corrective actions taken. Failure to comply with the airworthiness directive can lead to serious consequences. Under the Civil Aviation Regulations, non-compliance can result in the aircraft being deemed unairworthy, which can prevent it from operating until the required inspections and repairs are completed. Additionally, there are potential civil penalties for non-compliance, including fines. While the specific maximum penalties are not detailed within this directive, they are outlined in other sections of the Civil Aviation Regulations and can be significant, reflecting the importance of adhering to airworthiness directives to ensure safety in aviation operations.