AD/CJ610/6 - Stage 2 Turbine Wheels

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of the Commonwealth of Australia, is a comprehensive piece of legislation designed to govern all aspects of civil aviation within Australia. Specifically, Part 39 of these regulations includes the "Civil Aviation Safety Authority Schedule of Airworthiness Directives," which ensures that aircraft and their components meet the required safety standards. One such directive, AD/CJ610/6, pertains to General Electric Turbine Engines of the CJ610 Series, focusing on stage 2 turbine wheels. This directive was introduced to address a specific safety concern identified in certain CJ610 engines, where stage 2 turbine wheels with particular serial numbers might have imperfect contours that could potentially compromise the wheel's lifespan and overall safety. The policy objective of this directive is to mandate the immediate removal and replacement of these potentially defective turbine wheels to prevent any risk to air safety. The enacting body for these regulations is the Parliament of the Commonwealth of Australia, which established the Civil Aviation Regulations 1998 to maintain and enhance the safety of civil aviation. The specific directive AD/CJ610/6 targets a critical component of the turbine engine, aiming to ensure that all affected turbine wheels are replaced without delay. This proactive measure is crucial in maintaining the integrity and safety of the aircraft in operation, thereby safeguarding the lives of passengers and crew, as well as the general public.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 106, under the Civil Aviation Safety Authority's Schedule of Airworthiness Directives, pertains to the General Electric Turbine Engines of the CJ610 series. This legislation applies to the CJ610-1, -4, -5, and -6 engines that are fitted with P/N 646C596P2 turbine wheels and have serial numbers listed in the accompanying requirement document. The regulation ensures compliance with General Electric Service Bulletin (SB) CJ610) 72-143, or AD/GE-T/42, mandating the immediate removal of any affected stage 2 turbine wheels from service to mitigate potential risks associated with imperfect contours in the forward rabbet radius, which could otherwise limit the operational life of the wheels. The directive applies nationally across the Commonwealth of Australia, covering all entities and persons operating aircraft equipped with the specified turbine engines. There are no exclusions, exemptions, or thresholds outlined in the directive, and it is enforceable through the issuance of subordinate instruments by the Civil Aviation Safety Authority.

Key Provisions

The Civil Aviation Regulations 1998, particularly Part 39, includes specific Airworthiness Directives (AD) that govern the maintenance and operational standards of certain aircraft engines. One such directive, AD/CJ610/6, pertains to the General Electric CJ610 Series turbine engines (sections 1-9). This directive applies to CJ610-1, -4, -5, -6 engines that are equipped with turbine wheels identified by Part Number 646C596P2 and serial numbers listed in the accompanying requirement document. The directive mandates compliance with either General Electric Service Bulletin (SB) CJ610 72-143 or AD/GE-T/42, and requires immediate action (section 9). The obligations imposed by AD/CJ610/6 include ensuring that any CJ610 Series turbine engines with the specified turbine wheels are inspected and, if necessary, the affected wheels are replaced. This is to prevent operational issues that may arise from the imperfect contours in the forward rabbet radius of certain stage 2 turbine wheels, which could potentially shorten the life of the wheel and compromise safety (section 9). The directive requires that compliance be achieved forthwith, indicating the urgency with which these inspections and replacements should be carried out. Failure to adhere to the provisions of AD/CJ610/6 could result in significant legal consequences. The Civil Aviation Regulations provide for various penalties for non-compliance with airworthiness directives. These penalties can include fines and, in severe cases, criminal charges. The maximum penalties can vary depending on the specific breach and the discretion of the court, but they can be substantial, reflecting the importance of maintaining airworthiness standards to ensure public safety (sections 1-9). It is essential for operators and maintainers of the affected aircraft to comply fully with this directive to avoid these potential legal repercussions.