AD/CESSNA 500/4 Amdt 1 - Flight Compartment Side Windows - Inspection and Replacement

Overview

The Civil Aviation Regulations 1998, as amended, include specific provisions for maintaining the airworthiness of aircraft in Australia. One such provision is detailed in the 1998 Regulations under Part 39, specifically addressing the Cessna 500 (Citation) Series Aeroplanes. This legislative instrument was introduced to address safety concerns related to the flight compartment side windows of these aircraft. The problem it aimed to resolve was the potential for structural failure of the windows, which could compromise the safety of the aircraft and its occupants. The Australian Government, through the Civil Aviation Safety Authority, established these directives to ensure that all applicable aircraft are inspected and maintained according to stringent safety standards. The policy objective is to mitigate any risk of window failure by mandating regular inspections and replacements, ensuring continued safety in the operation of these aircraft within Australian airspace.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, mandates airworthiness directives concerning aircraft maintenance and safety, with a particular focus on Cessna 500 (Citation) Series aeroplanes. These regulations apply to all model 500 aircraft except those fitted with flight compartment side windows bearing parts numbers 5511285-34-4. The regulation requires an inspection of the flight compartment side windows in accordance with the Cessna Citation SL 56-2 Rev. 1 and mandates their replacement according to SB 56-4. The directive stipulates that compliance must be achieved before the aircraft reaches 400 hours of time in service, with subsequent inspections occurring at intervals not exceeding 100 hours of time in service until the modification is made. The regulation also specifies that modifications must be completed before 1 September 1975. This legislation is part of the overarching framework under which the Civil Aviation Safety Authority operates, ensuring the safety and airworthiness of civil aviation within Australia.

Key Provisions

The main operative sections of this legislation, specifically AD/CESSNA 500/4Amdt 1, pertain to the inspection and replacement of flight compartment side windows on Cessna 500 (Citation) Series Aeroplanes. Section 1 outlines the requirement for these inspections and replacements to be conducted in accordance with Cessna Citation SL 56-2 Rev. 1 and SB 56-4, respectively. Section 2 specifies that these actions must be completed before the aeroplane achieves 400 hours of time in service and then at intervals not exceeding 100 hours of time in service until modifications are made. Furthermore, it mandates that the modifications must be completed before 1 September 1975. The Act imposes several obligations and requirements on the parties governed by these provisions. Firstly, it requires that all model 500 Cessna Citation aeroplanes, excluding those fitted with flight compartment side windows P/Nos. 5511285-34-4, undergo the specified inspections and replacements. These inspections and replacements are to be carried out meticulously following the outlined procedures in Cessna Citation SL 56-2 Rev. 1 and SB 56-4. The compliance timeline necessitates that these actions are completed before the aeroplane reaches 400 hours of operational time and then at intervals not exceeding 100 hours until modifications are made, with a strict deadline of 1 September 1975 for completing the modifications. Failure to adhere to the specified requirements and timelines can lead to serious consequences. Although the specific offences and penalties are not detailed within the provided text, non-compliance with Civil Aviation Regulations typically results in civil or criminal penalties under the Civil Aviation Act 1988. The Civil Aviation (Investigation of Aviation Accidents and Incidents) Regulations 2013 and the Civil Aviation (General Aviation Safety) Regulations 2010 also outline potential penalties for breaches, which can include substantial fines and imprisonment for individuals, alongside potential penalties for corporations. The exact penalties depend on the severity and nature of the breach, but they can be severe, reflecting the critical importance of adhering to aviation safety regulations. In summary, the Civil Aviation Regulations 1998, specifically the AD/CESSNA 500/4Amdt 1, establish clear requirements for inspecting and replacing flight compartment side windows on Cessna 500 Series Aeroplanes. These provisions mandate compliance with specified procedures and timelines, with significant legal consequences for non-compliance. While the provided text does not detail specific penalties, it is clear that adherence to these regulations is crucial for maintaining aviation safety standards.