AD/TPE 331/44 - Pitch Control Gasket

Overview

The Civil Aviation Regulations 1998, as amended, include provisions within Part 39 to ensure the safety and airworthiness of aircraft engines, specifically addressing issues related to the AlliedSignal (Garrett/AiResearch) Turbine Engines - TPE 331 Series. One such provision is Airworthiness Directive AD/TPE 331/44 concerning the pitch control gasket for these engines. This directive was introduced in response to multiple reports of gasket failures, which led to a sudden loss of engine oil and propeller control, posing significant safety risks. The objective of this directive is to mandate actions in accordance with specific service bulletins issued by Garrett (Allied-Signal), ensuring that the gasket replacement complies with stringent safety standards to prevent future incidents. The directive applies to engines that had the propeller pitch control gasket replaced after a specified date, requiring compliance within certain timeframes to maintain operational safety. The Civil Aviation Safety Authority, established under the Civil Aviation Act 1988, is the authority responsible for enacting such regulations to safeguard public safety in civil aviation.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39, includes detailed safety directives applicable to various components and operations within the aviation industry. This particular regulation, AD/TPE 331/44, focuses on the AlliedSignal (Garrett/AiResearch) Turbine Engines - TPE 331 Series, more precisely on the pitch control gasket. The directive applies to a range of TPE 331 engine models that have had their propeller pitch control gasket replaced post 10 May 1992. The requirement is for adherence to Garrett (Allied-Signal) Service Bulletin TPE331-A72-7092 or TPE331-A72-0857, as relevant. The directive mandates that for engines already installed, compliance must occur within the next ten hours of time in service from 21 December 1992, and for uninstalled engines, compliance is required before they are installed in an aircraft. This directive is a response to several reported failures of the pitch control gasket, which led to a sudden loss of engine oil and propeller control, highlighting the critical nature of these safety measures. The Civil Aviation Regulations 1998 are enforced by the Civil Aviation Safety Authority and have a broad jurisdictional reach across Australia, ensuring that all entities and persons involved in the specified aviation activities comply with these safety directives.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39, Section 106, detail the Airworthiness Directives for certain types of turbine engines, including those produced by AlliedSignal (Garrett/AiResearch). Section AD/TPE 331/44, titled "Pitch Control Gasket," applies to TPE 331 Series engines, which have undergone propeller pitch control gasket replacement after 10 May 1992. This section requires that any action taken must comply with Garrett (Allied-Signal) Service Bulletins TPE331-A72-7092 or TPE331-A72-0857, as applicable, and references FAA Priority Letter Airworthiness Directive 92-26-07. Entities and parties governed by this Act must adhere to strict timelines and procedures to ensure compliance. For engines that have been installed, the required actions must be completed within the next 10 hours of time in service from 21 December 1992. For engines that are not yet installed, these actions must be performed prior to the engine being placed in an aircraft. Failure to comply with these directives can lead to serious safety risks, including a sudden loss of engine oil and control of the propeller, which has already resulted in incidents such as one occurring during the landing run when reverse pitch was applied. In terms of consequences for non-compliance, the Civil Aviation Regulations 1998 impose significant penalties and legal ramifications. Any breaches of the outlined directives can result in both civil and criminal liabilities. The maximum penalties may include fines and potential imprisonment, depending on the severity and impact of the non-compliance. The precise nature and extent of these penalties are further detailed within the broader framework of the Civil Aviation Act 1988, which governs aviation safety and regulatory compliance in Australia. It is essential for all stakeholders to understand and adhere to these regulations to maintain the highest standards of safety in aviation.