AD/AL 250/50 Amdt 1 - N2 Overspeed Control Assembly - Addition of Lockwashers to Ground Jumper Lead

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, are a comprehensive set of rules designed to ensure the safety and efficiency of civil aviation within Australia. Part 39 of these regulations specifically focuses on the issuance of Airworthiness Directives (ADs) to address particular safety concerns for various aircraft components and systems. One such directive, AD/AL 250/50 Amendment 1N2, pertains to Allison Turbine Engines of the 250 Series, specifically targeting models 250-C28C, C30, and C30S. This AD was introduced to address issues related to the overspeed control assembly, specifically by adding lockwashers to the ground jumper lead to prevent potential failures that could lead to engine overspeed situations. The policy objective of this amendment is to enhance the overall safety of flights by mitigating risks associated with engine performance and reliability. The amendment to AD/AL 250/50 Amendment 1N2 was made by the Civil Aviation Safety Authority (CASA), which is the body responsible for enforcing the Civil Aviation Regulations and ensuring compliance with safety standards. The directive applies to all specified engine models except those explicitly exempted in the relevant documents, such as Allison 250-C28C Alert CEB A73-2024, Revision 2, and Allison 250-C30S Alert CEB A73-3015, Revision 2. Compliance with this directive is mandatory and must be achieved in accordance with the requirements outlined in the relevant documentation. This amendment aims to ensure that all affected engines meet the necessary safety standards to prevent any potential overspeed incidents, thereby safeguarding both the aircraft and its occupants.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 106, govern the airworthiness directives in Australia, with a particular focus on Allison Turbine Engines of the 250 Series. This legislative instrument applies to all model 250-C28C and C30S engines used in civil aviation operations within Australia, except for those specifically exempted in the relevant documentation. These directives ensure that all pertinent safety measures are adhered to, thereby maintaining the airworthiness of the aircraft and protecting both crew and passengers. The geographic reach of this regulation is national, extending throughout the Commonwealth of Australia and ensuring a standardised approach to aviation safety across the country. The directive mandates compliance as per the requirement documents, specifically referencing Allison 250-C28C Alert CEB A73-2024, Rev. 2, and Allison 250-C30S Alert CEB A73-3015, Rev. 2, which detail the specific modifications required to the overspeed control assembly, including the addition of lockwashers to the ground jumper lead. Any amendments to the application of these directives are incorporated through subordinate instruments, ensuring the regulations remain current and effective in addressing any emerging safety concerns.

Key Provisions

The primary operative sections of this legislation, specifically Part 39 of the Civil Aviation Regulations 1998, address the airworthiness directives related to Allison Turbine Engines of the 250 Series. Section 106(1) mandates the implementation of AD/AL 250/50 Amendment 1N2, which concerns the addition of lockwashers to the ground jumper lead of the overspeed control assembly. This requirement applies to all model 250-C28C and C30S engines, with exceptions outlined in the specified documents. Compliance with these directives is to be achieved as per the requirement document, ensuring that all relevant engines are updated according to the provided specifications. Under these regulations, the obligations imposed on the parties or entities governed by this legislation are quite clear. The entities must ensure that the Allison Turbine Engines of the 250 Series, specifically models 250-C28C and C30S, comply with the airworthiness directives. This involves the addition of lockwashers to the ground jumper lead of the overspeed control assembly. The directive specifies that the updates should be carried out according to the detailed instructions provided in the requirement documents, namely Allison 250-C28C, Alert CEB A73-2024, Rev. 2, and Allison 250-C30S, Alert CEB A73-3015, Rev. 2. Entities must ensure that the specified engines are identified and updated, except those exempted in the provided documents. In terms of penalties and consequences for non-compliance, the legislation does not explicitly state the civil or criminal penalties within the provided text. However, it is understood that non-compliance with airworthiness directives can result in significant legal repercussions. In general, violations of the Civil Aviation Regulations can lead to severe penalties, including fines and potential imprisonment for criminal offences. The severity of these penalties is dependent on the nature and extent of the breach, with maximum penalties often outlined in other sections of the Civil Aviation Act 1988 or relevant regulations. The overarching principle is that adherence to airworthiness directives is crucial for maintaining safety standards in aviation, and failure to comply can result in serious legal and safety consequences.