Overview

The Civil Aviation Regulations 1998, as amended and detailed in the legislative instrument F2006B08431, address safety concerns related to the structural integrity of the cabin door frame in the Cessna 550 (Citation II) series aeroplanes. This regulation was enacted to ensure that all aircraft models within the specified unit numbers (0002 to 0128) comply with safety standards, particularly focusing on the inspection, modification, and replacement of the cabin door frame to prevent potential safety risks. The objective of this regulation is to mitigate the risk associated with the marginal edge distances of rivets in the fuselage frame and the “Z” angle of the aft door post, ensuring the continued airworthiness of these aircraft. The regulation was enacted by the Australian Government to enhance aviation safety standards in line with international best practices. The Civil Aviation Safety Authority (CASA) is responsible for enforcing these regulations, ensuring that all aircraft within the specified models adhere to the outlined safety directives. The policy objective behind this regulation is to maintain and improve the safety of civil aviation by addressing specific structural vulnerabilities in the cited aircraft models. Compliance with these directives is mandatory, and non-compliance can result in penalties or grounding of the aircraft until the necessary modifications are made. This regulation is a critical component of the broader framework designed to safeguard passengers, crew, and the general public from aviation-related hazards.

Scope and Application

The Civil Aviation Regulations 1998, specifically under Part 39 - 105, establish the Civil Aviation Safety Authority's schedule of airworthiness directives which apply to all aircraft registered in Australia, including the Cessna 550 (Citation II) series aeroplanes with unit numbers 0002 to 0128. These regulations mandate the inspection, modification, and replacement of the cabin door frame as per the requirements outlined in the Cessna Citation II Service Bulletin 550-53-3, Revision 4. The directive is aimed at ensuring the structural integrity of the aircraft by addressing potential issues with the rivets' marginal edge distances of the fuselage frame and the “Z” angle of the aft door post. The regulations apply to all operators and owners of the specified aircraft models, ensuring compliance with the specified maintenance requirements to maintain airworthiness standards. The application of these regulations extends across the entire Commonwealth of Australia, overseen by the Civil Aviation Safety Authority. The regulations provide a clear mandate for specific maintenance actions and do not contain any exclusions or exemptions. The compliance requirements are stringent and must be adhered to by all relevant parties, with any failure to comply potentially leading to enforcement actions by the regulatory authority. The regulations may also extend their application through subordinate instruments or further directives, ensuring continuous oversight and adherence to safety standards.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, address the safety directives for the Cessna 550 (Citation II) series aeroplanes. Section AD/CESSNA 550/3 focuses on the inspection, modification, and replacement of the cabin door frame. This directive applies to all models 550 with unit numbers ranging from 0002 to 0128. The requirement document, Cessna Citation II SB 550-53-3, Revision 4, outlines the compliance criteria, which must be adhered to ensure safety standards are met. Compliance with this directive is essential to address the possibility of marginal edge distances of rivets in the fuselage frame and the "Z" angle of the aft door post. Under these regulations, the operators of the affected Cessna 550 series aircraft must conduct thorough inspections of the cabin door frame to identify any issues related to rivet edge distances and the "Z" angle of the aft door post. Operators are required to follow the procedures detailed in the Cessna Citation II SB 550-53-3, Revision 4 document. This includes making modifications or replacements as necessary to ensure the structural integrity of the aircraft is maintained. The directive also mandates that any work performed must meet the specifications set forth in the requirement document to guarantee compliance with safety standards. Failure to comply with the provisions outlined in Section AD/CESSNA 550/3 can result in significant consequences. The Civil Aviation Safety Authority (CASA) has the authority to enforce penalties for non-compliance with airworthiness directives. These penalties can include fines and potential grounding of the aircraft until the necessary modifications are completed. The severity of the penalties may vary depending on the extent of non-compliance and the impact on the safety of the aircraft. Operators are thus under a strict obligation to ensure that all inspections, modifications, and replacements are carried out in accordance with the directive to avoid any legal or safety repercussions. In summary, Section AD/CESSNA 550/3 of the Civil Aviation Regulations 1998 mandates specific inspections, modifications, and replacements of the cabin door frame for Cessna 550 series aircraft with unit numbers 0002 to 0128. Operators are required to follow the detailed procedures in the Cessna Citation II SB 550-53-3, Revision 4 document to ensure compliance. Failure to adhere to these requirements can result in penalties enforced by CASA, which may include fines and the grounding of the aircraft until the necessary work is completed.