AD/CESSNA 500/16 Amdt 1 - Cabin Door Frame - Inspection, Modification and Replacement

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105, under the authority of the Civil Aviation Safety Authority, encompasses the Schedule of Airworthiness Directives for Cessna 500 (Citation) Series Aeroplanes. This legislation was enacted to address the safety concerns related to the cabin door frame of these aircraft models, particularly the potential for marginal edge distances of rivets in the fuselage frame and the "Z" angle of the aft door post. The policy objective is to ensure that any detected offset greater than 0.25 inch is rectified through inspection, modification, or replacement of components, as mandated by Cessna Citation Service Bulletin No. 53-12, Revision 3. The Civil Aviation Regulations 1998, as amended, seek to maintain the airworthiness of aircraft by mandating compliance with specific directives aimed at rectifying identified safety issues. The applicability of this particular directive includes all models 500 and 501, with unit numbers ranging from 0001 to 0532. By requiring adherence to the compliance standards set out in the Cessna Citation Service Bulletin No. 53-12, Revision 3, the legislation ensures that any potential structural weaknesses are addressed to uphold the safety and operational integrity of the aircraft.

Scope and Application

The Civil Aviation Safety Authority Schedule of Airworthiness Directives, specifically AD/CESSNA 500/16 Amendment 1, applies to all Cessna 500 and 501 series aeroplanes with unit numbers ranging from 0001 to 0532. This legislation is pertinent to the aviation industry and is enforced by the Civil Aviation Safety Authority within the Commonwealth of Australia. The directive mandates the inspection, modification, and replacement of the cabin door frame to address the identified issue of marginal edge distances of rivets in the fuselage frame and the "Z" angle of the aft door post. Non-compliance with the requirements set forth in the Cessna Citation Service Bulletin No. 53-12, Revision 3, is not permissible. The directive is applicable nationally, encompassing all relevant aircraft within the specified unit number range, and does not specify any exclusions, exemptions, or thresholds beyond the defined unit numbers and model types. The application and enforcement of this directive may be further detailed or extended through subordinate instruments as necessary.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39, mandates that certain Cessna 500 series aeroplanes undergo thorough inspections and modifications to their cabin door frames. Section 39-105 of the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives addresses these requirements (AD/CESSNA 500/16 Amendment 1). The directive applies to all Cessna 500 and 501 models with unit numbers ranging from 0001 to 0532, encompassing a total of 532 aircraft. This requirement is detailed in Cessna Citation Service Bulletin No. 53-12, Revision 3, which serves as the compliance document for these safety measures. The primary obligation under this directive is to ensure that the cabin door frames of the specified Cessna 500 series aeroplanes are inspected for the correct edge distances of rivets and the "Z" angle of the aft door post. If the inspection reveals that the rivet edge distances are marginal or the "Z" angle does not meet specified standards, the affected component must be modified or replaced. This modification is specifically required when the offset exceeds 0.25 inches. Compliance with these directives is mandatory for all operators of the affected aircraft to maintain their airworthiness certificates. Failure to comply with the provisions of AD/CESSNA 500/16 Amendment 1 could result in serious safety risks, as the issues identified could potentially lead to structural failures in the cabin door frame. The regulations impose strict obligations on aircraft operators to conduct the required inspections and make necessary modifications or replacements to ensure the safety of the aircraft. Non-compliance with these directives can lead to severe consequences, including potential grounding of the aircraft, revocation of airworthiness certificates, and possible legal action under civil and criminal aviation laws. Under the Civil Aviation Regulations 1998, penalties for non-compliance with airworthiness directives can be substantial. The maximum penalties for breaches include fines up to $165,000 for individuals and $825,000 for corporations, as well as potential imprisonment for up to five years for serious violations. Additionally, CASA has the authority to issue notices to rectify non-compliance, impose administrative penalties, or take enforcement actions to ensure that all affected aircraft meet the specified safety standards.