AD/CESSNA 500/6 - Oxygen Mask Door Actuating Piston - Replacement

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, represent a comprehensive legislative framework designed to regulate civil aviation activities within Australia. The 1998 Regulations, overseen by the Civil Aviation Safety Authority (CASA), serve to ensure the safety and efficiency of civil aviation operations in the country. Among the numerous parts that constitute these regulations, Part 39 specifically addresses airworthiness directives, which are legally enforceable rules related to the design, production, maintenance, and operation of aircraft. One such airworthiness directive is AD/CESSNA 500/6, which pertains to the replacement of the oxygen mask door actuating piston in certain models of the Cessna 500 (Citation) Series Aeroplanes. This directive was introduced to address safety concerns related to the oxygen mask door mechanism in specific serial number ranges, ensuring that these aircraft continue to meet stringent airworthiness standards. The AD/CESSNA 500/6 aims to rectify identified safety issues by mandating the replacement of the oxygen mask door actuating piston in all Cessna 500 series aeroplanes with serial numbers ranging from 500-0041 to 500-0065, with the exception of serial number 500-0063. This directive ensures compliance with safety standards set forth by the Civil Aviation Safety Authority, thereby enhancing the overall safety of these aircraft. The policy objective behind this directive is to mitigate any potential risks associated with the specified component, ensuring that aircraft operations remain within the safe operational parameters set by Australian aviation regulations.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, under the authority of the Civil Aviation Safety Authority, governs the airworthiness directives for certain aircraft models, including the Cessna 500 (Citation) Series Aeroplanes. The particular directive AD/CESSNA 500/6 pertains to the replacement of the oxygen mask door actuating piston. This regulation applies to all models of the Cessna 500 Series with serial numbers ranging from 500-0041 to 500-0065, with the exception of serial number 500-0063. This directive ensures that these aircraft meet specific safety standards, with compliance required before 29 March 1974, as referenced in the Cessna Citation SL35-1 and Puritan-Zep Service Bulletin dated 15 March 1973. The regulation extends its reach across the Commonwealth of Australia, applying uniformly to all relevant aircraft within its jurisdiction, and it does not explicitly mention any exclusions or exemptions. The authority to further extend or restrict application is implicitly held through the issuance of subordinate instruments by the Civil Aviation Safety Authority.

Key Provisions

The primary operative sections of the AD/CESSNA 500/6 are Sections 39-105 (1) and (2), which pertain to the specific requirements for the oxygen mask door actuating piston replacement for Cessna 500 series aeroplanes with serial numbers ranging from 500-0041 to 500-0065, excluding serial number 500-0063. These sections detail the necessity for compliance with the specified modifications, referencing the document dated 15 March 1973 from Cessna Citation SL35-1 and Puritan-Zep. The requirement for compliance is set before 29 March 1974, as outlined in section 3/74. The Act imposes specific obligations and requirements on the operators and owners of the affected Cessna 500 series aeroplanes. Primarily, these obligations involve ensuring that the oxygen mask door actuating piston is replaced according to the specifications outlined in the referenced document. This includes conducting a thorough inspection to determine the need for replacement and undertaking the necessary modifications in a timely manner to maintain airworthiness standards. Operators and owners must ensure that all modifications are completed before the specified compliance date to avoid any regulatory repercussions. Failure to comply with the provisions of the AD/CESSNA 500/6 could result in significant consequences. Under civil aviation regulations, non-compliance with an Airworthiness Directive can lead to the aircraft being grounded, pending rectification of the issue. In more severe cases, the Civil Aviation Safety Authority (CASA) may take enforcement action against the operator or owner. Potential penalties can include fines and legal action, with the severity of the penalty dependent on the degree and impact of the non-compliance. The exact penalties are not specified in the provided text, but they could range from monetary fines to more stringent enforcement measures if the non-compliance results in safety hazards.