AD/CT58/14 - Lead Lag Servo Housing

Overview

The Civil Aviation Regulations 1998, as amended by the legislative instrument F2006B08672, introduces specific airworthiness directives aimed at ensuring the safety and reliability of aircraft engines. This legislative framework was enacted to address the need for consistent and stringent safety standards across the aviation industry in Australia. The Civil Aviation Safety Authority, acting under the authority of the Commonwealth Parliament, established these regulations to mitigate risks associated with aircraft operations, including those pertaining to engine safety. The policy objective is to ensure that all civil aviation activities within Australian airspace adhere to high safety standards, thereby protecting the public and maintaining the integrity of the national aviation system. One particular directive, AD/CT58/14, pertains to General Electric CT58 series turbine engines, focusing on the lead lag servo housing. This directive mandates specific inspection procedures for fuel controls that contain counter bores in certain screw holes, as detailed in the manufacturer's requirement document, General Electric SB (CT58) A73-71 Rev. 1 or AD/GE-T/36A. Compliance with these directives is crucial for maintaining the airworthiness of the affected engines, thus contributing to the overarching goal of aviation safety.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 106, pertains to the Civil Aviation Safety Authority’s Schedule of Airworthiness Directives, including AD/CT58/14 concerning General Electric Turbine Engines of the CT58 Series. This directive applies to all CT58 model engines, necessitating compliance with the specified requirements to ensure airworthiness. The scope of the directive extends to the inspection procedures outlined in the manufacturers' requirement documents, notably General Electric SB (CT58) A73-71 Rev. 1, or AD/GE-T/36A. Compliance with these documents is mandatory, ensuring that all identified issues, particularly those related to fuel controls with counter bores in specific screw holes used in the lead lag servo housing, are addressed. The directive operates under the Commonwealth of Australia, with its application and enforcement overseen by the Civil Aviation Safety Authority. There are no specified exclusions or exemptions within this directive, and it is applicable nationally, transcending state and territory boundaries to maintain uniform safety standards across the aviation industry. The directive’s application can be further refined or extended through subordinate instruments issued by the Civil Aviation Safety Authority.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 106, includes the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, which governs the maintenance and operation of aircraft in Australia. One such directive, AD/CT58/14, pertains to General Electric CT58 Series turbine engines (section 9/85). This directive applies to all CT58 model engines, necessitating compliance with either General Electric SB (CT58) A73-71 Rev. 1 or AD/GE-T/36A as the requirement document (section Applicability). Compliance with these documents is mandatory, which means that all inspections and maintenance actions must be conducted in accordance with the specified procedures outlined in these documents (section Compliance). The obligations imposed by AD/CT58/14 require operators of CT58 model engines to perform additional inspection procedures as detailed in the referenced documents. These inspections are crucial to ensure the safety of the aircraft and the proper functioning of the fuel controls. Specifically, the directive mandates that inspections be conducted on the fuel controls that contain counter bores in two of the screw holes used to retain the lead lag servo housing (section Background). This inspection is integral to preventing potential issues that could compromise the safety of the aircraft. Failure to comply with AD/CT58/14 can lead to severe consequences. Non-compliance with Airworthiness Directives is a serious offence under the Civil Aviation Act 1988. The Civil Aviation Regulations 1998 impose strict penalties for breaches, which can include both civil and criminal penalties. Civil penalties can result in fines, while criminal penalties may include imprisonment. The maximum penalties for non-compliance with airworthiness directives are significant, reflecting the critical importance of adhering to these safety measures. Operators found in breach of these regulations may face substantial fines and potential imprisonment, underscoring the gravity of ensuring compliance with CASA directives.