AD/AL 250/69 - Installation of Internal Energy Absorbing Ring

Overview

The Civil Aviation Regulations 1998, amended by the Legislative instrument F2006B02280, aim to address specific safety concerns related to Allison Turbine Engines, particularly the 250 Series. This legislation was enacted to enhance the safety standards within the aviation industry by requiring the installation of an internal energy absorbing ring in certain Allison 250 series engines. The regulation is part of the broader regulatory framework overseen by the Civil Aviation Safety Authority (CASA), which seeks to ensure that all aircraft meet stringent safety standards to protect both passengers and crew. The policy objective behind this directive is to mitigate the risk of secondary damage to the airframe in the event of a no. 1 turbine wheel burst, thereby ensuring the continued airworthiness and safety of the aircraft in operation.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 106, which governs the Civil Aviation Safety Authority Schedule of Airworthiness Directives, applies to Allison Turbine Engines of the 250 Series. This particular directive, AD/AL 250/69, is concerned with the installation of an internal energy absorbing ring for specific models of Allison engines, namely the 250-C28, -C28B, and -C28C engines that lack the internal energy absorbing ring part number 23031865. The regulation mandates compliance with the requirement document Allison C.E.B.-A-72-2126, ensuring that these engines meet the specified safety standards. The directive is designed to mitigate the risk of secondary damage to the airframe in the event of a no. 1 turbine wheel burst by containing debris effectively. This legislative measure extends across the Commonwealth of Australia and applies to all relevant aircraft operators and maintenance entities within the national jurisdiction.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39, Section 106, details the Airworthiness Directives (AD) which govern the maintenance and operation of aircraft in Australia. The directive AD/AL 250/69 pertains to Allison Turbine Engines of the 250 Series, focusing on the installation of an internal energy absorbing ring (section 2/86). This directive applies to 250-C28, -C28B, and -C28C engines that do not currently have the internal energy absorbing ring P/N 23031865 installed. The requirement, outlined in Allison C.E.B.-A-72-2126, mandates that these engines must comply with the specified requirement document to ensure compliance. Under the Civil Aviation Regulations, the entities responsible for ensuring compliance with this directive include aircraft operators, maintenance organisations, and any other relevant parties involved in the maintenance or operation of the specified Allison Turbine Engines. The directive imposes a clear obligation on these parties to adhere to the requirement document, ensuring that the internal energy absorbing ring is installed where necessary. This is to mitigate the risk of debris from a number 1 turbine wheel burst, which could otherwise cause secondary damage to the airframe. Failure to comply with this Airworthiness Directive can result in serious consequences. The regulations provide for both civil and criminal penalties for non-compliance. Civil penalties can include fines and enforcement actions taken by the Civil Aviation Safety Authority (CASA). Criminal penalties may also apply, depending on the severity of the breach and the potential risk posed to aviation safety. The exact penalties are not specified in this particular directive but typically align with the broader provisions of the Civil Aviation Act 1988 and related regulations. It is crucial for all involved parties to understand and fulfil their obligations to prevent any adverse outcomes.