AD/AC/29 Amdt 2 - Fuel Sump Casting P/N 4630068 - Inspection

Overview

The Civil Aviation Regulations 1998 were enacted to ensure the safety of civil aviation in Australia, establishing stringent standards for airworthiness, pilot licensing, and aircraft maintenance among other things. The Act was introduced to address the need for comprehensive regulations governing civil aviation to ensure the safety of passengers, crew, and the general public. The Civil Aviation Regulations 1998 were enacted by the Parliament of Australia and their policy objective is to provide a robust framework for the regulation of civil aviation to promote safety, efficiency, and environmental protection in the sector. The legislative instrument F2006B02088, which is part of the Civil Aviation Regulations 1998, pertains to airworthiness directives for specific models of Twin Commander aeroplanes. This instrument was introduced to address specific safety concerns related to the fuel sump casting of certain Twin Commander aeroplanes, requiring regular inspections and, where necessary, replacement of the sump casting to maintain airworthiness standards. This legislative instrument is part of the broader regulatory framework established by the Civil Aviation Regulations 1998 to ensure the safe operation of civil aircraft in Australia.

Scope and Application

The Civil Aviation Regulations 1998, as part of the legislative framework overseen by the Civil Aviation Safety Authority (CASA), govern the airworthiness directives pertinent to specific aircraft models, including the Twin Commander series (Gulfstream/Rockwell/Aerocommander 500, 600, and 700). Specifically, this directive applies to all models within this series except the 500A, 500B, 500U, 680T, and 1121, and to serial numbers ranging from 231 to 1450. The regulation mandates that operators of these aircraft must inspect the vapour box before each flight and the sump casting at twelve-month intervals. These inspections must continue until the sump is replaced with sump P/N 4630202, as outlined in Aero Commander Service Bulletin No. 91. This directive ensures compliance with safety standards and helps maintain the airworthiness of the specified aircraft, thereby protecting the safety of passengers and crew. The regulations are applicable nationally, under the jurisdiction of the Commonwealth, and are enforced by CASA. There are no stated exclusions or exemptions within the scope of this specific airworthiness directive.

Key Provisions

The Civil Aviation Regulations 1998, particularly in Part 39 - 105, outline the specific requirements for maintaining the airworthiness of Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) series aeroplanes. Section 12/67 mandates that all applicable models with serial numbers ranging from 231 to 1450, excluding certain variants like 500A, 500B, 500U, 680T, and 1121, must undergo specific inspections. These inspections are detailed in Aero Commander Service Bulletin No. 82A. The main requirement is to inspect the vapour box before each flight and to inspect the sump casting at twelve-month intervals until the sump is replaced with the specified part number 4630202, as per Aero Commander Service Bulletin No. 91. Operators of these aircraft must ensure that the inspections are carried out strictly in accordance with the specified documentation. The vapour box inspection before each flight is a recurring obligation, ensuring that there are no leaks or damages that could compromise flight safety. The annual inspection of the sump casting is equally critical, as it ensures that the casting is in good condition or needs replacement. Failure to adhere to these inspection schedules could result in the aircraft being deemed unairworthy, leading to potential grounding and further regulatory scrutiny. The regulations impose clear obligations on aircraft operators, maintenance personnel, and other responsible parties to perform and document these inspections meticulously. Operators must ensure that their maintenance teams are adequately trained and that they have access to the necessary service bulletins and documentation. Any findings during the inspection process must be recorded, and any necessary repairs or replacements must be carried out without delay. This ensures that the aircraft remains compliant with airworthiness standards at all times. Failure to comply with these airworthiness directives can lead to significant consequences. Under the Civil Aviation Regulations, non-compliance can be considered a breach of the conditions of the aircraft’s certificate of airworthiness. Such breaches may result in enforcement actions by the Civil Aviation Safety Authority (CASA). The penalties for non-compliance can include fines and, in severe cases, the suspension or revocation of the aircraft’s operating certificate. The maximum penalties for such regulatory breaches are determined by the severity of the non-compliance and the potential risk posed to flight safety.