Overview

The Civil Aviation Regulations 1998, as amended through the legislative instrument F2006B03147, were enacted to address safety concerns associated with the operation of Boeing 747 series aeroplanes, specifically targeting engine thrust control cables. This legislative instrument was introduced to mitigate risks posed by wear, corrosion, and broken wires in the engine thrust control cables, which could compromise the structural integrity and safe operation of the aircraft. The enacting body, the Parliament of the Commonwealth of Australia, aimed to ensure the highest standards of aviation safety through these regulations, thereby protecting passengers, crew, and the general public. The overarching policy objective was to mandate rigorous inspection and maintenance protocols to prevent in-flight failures that could lead to catastrophic outcomes.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to all Boeing 747 series aeroplanes in Australia and mandates adherence to airworthiness directives issued by the Civil Aviation Safety Authority. This legislation is designed to ensure the safety and airworthiness of these aircraft by enforcing detailed inspections and replacement criteria for engine thrust control cables. The Act applies to all aircraft operators, maintenance organisations, and personnel involved in the operation and maintenance of Boeing 747 aircraft within Australian jurisdiction. The geographic reach of this legislation is national, impacting all aircraft registered in Australia and those operating within its airspace. The Act specifies exclusions and thresholds for when thrust control cables must be replaced based on wear, kinks, corrosion, and broken wires, providing clear guidelines for maintenance procedures to avoid compromising the safety of air travel. The application of this legislation may be further extended or restricted through subordinate instruments issued by the Civil Aviation Safety Authority.

Key Provisions

The main operative sections of the Civil Aviation Regulations 1998, Part 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives for Boeing 747 Series Aeroplanes, particularly AD/B747/249 Appendix A, focus on the inspection and replacement of engine thrust control cables. Section (a) under the inspection procedure mandates a detailed visual inspection of the engine thrust control cables to detect wear (105.001). If any cable strand has worn wires where the wire cross-section is decreased by more than 40 percent, if a kink is found, or if there is any evidence of corrosion, the cable assembly must be replaced (105.002). Additionally, section (b) outlines the procedure for inspecting the cables to detect broken wires. If two or more broken wires are detected in a 7x7 cable assembly, or if four or more broken wires are found in 12 continuous inches of a 7x19 cable assembly, or if six or more broken wires are found anywhere in the total cable assembly, the cable must be replaced (105.003). The Act imposes several obligations and requirements on the parties and entities it governs. Operators of Boeing 747 Series Aeroplanes must adhere to the detailed inspection and replacement criteria outlined in the Airworthiness Directives. This includes conducting a thorough visual inspection for wear and broken wires, and replacing cables that meet the specified criteria. Operators must ensure that all inspections and replacements are performed by qualified personnel and that the work is properly documented to maintain the airworthiness of the aircraft. These obligations are crucial to ensuring the safety and reliability of the aircraft's engine thrust control systems. Failure to comply with the provisions of the Airworthiness Directives can result in various civil and criminal consequences. The Act stipulates that non-compliance with the inspection and replacement requirements may lead to penalties under the Civil Aviation Act 1988. In cases of serious non-compliance, operators could face fines of up to $1.1 million for corporations and $220,000 for individuals, as well as potential criminal charges. These penalties underscore the importance of adhering to the safety directives to prevent accidents and maintain public confidence in air travel safety.