AD/TFE 731/3 Amdt 1 - H.P. Turbine Blade P/N 3072111-1 - Replacement

Overview

The Civil Aviation Regulations 1998, administered by the Civil Aviation Safety Authority (CASA), were enacted to ensure the safe operation of aircraft within Australian airspace. Part 39 of these regulations focuses on the safety of aircraft engines, including specific directives for maintaining airworthiness. One such directive, AD/TFE731/3, addresses the replacement of turbine blades for the AlliedSignal (Garrett/AiResearch) TFE731 Series engines, particularly those with part number 3072111-1. This amendment was introduced to ensure compliance with the latest manufacturer requirements and to prevent potential safety issues associated with the mixing of different blade versions. The objective is to maintain the integrity and safety of aircraft operations by adhering to updated technical specifications and ensuring that engines meet stringent airworthiness standards before exceeding 1000 hours of service time.

Scope and Application

The Civil Aviation Regulations 1998, under Part 39 - 106, specifically address the application of Airworthiness Directives (AD) concerning the AlliedSignal (Garrett/AiResearch) Turbine Engines, particularly the TFE731 Series. This legislation applies to the TFE 731-2-1C and -2-2B engines that are fitted with turbine blades bearing the part number 3072111-1. The directive mandates compliance with the Garrett S.B. TFE 731-72-3026 Rev 10, ensuring that engines do not exceed 1000 hours of time in service before adherence to the updated requirements is necessary. Notably, equipment that has been previously modified in accordance with an earlier version of this directive may require additional rework to meet the latest specifications. The directive also notes the importance of not mixing blades of different part numbers, specifically referencing S.B. TFE 731-72-3219 for proper turbine rotor assembly identification. This legislation, governed by the Commonwealth of Australia, ensures that the aviation industry maintains high safety standards and adheres to the latest manufacturer recommendations for engine components and modifications.

Key Provisions

The primary operative sections of the Civil Aviation Regulations 1998, specifically in Part 39 - 106, pertain to the Civil Aviation Safety Authority's (CASA) schedule of airworthiness directives. This particular directive (AD/TFE731/3) addresses the replacement of the H.P. turbine blade P/N 3072111-1 for AlliedSignal (Garrett/AiResearch) Turbine Engines of the TFE731 Series. According to section 106, this directive applies to TFE 731-2-1C and -2-2B engines fitted with the specified turbine blades (section 106.01). The requirement is to adhere to Garrett S.B. TFE 731-72-3026 Rev 10, with a note that any equipment modified in accordance with a previous issue of this directive may require further rework. Compliance must be achieved before the engine exceeds 1000 hours in service (section 106.02). The obligations imposed by this directive are primarily centred on ensuring that the specified turbine blades are replaced to maintain the airworthiness of the engine. Operators and owners must ensure that their TFE 731-2-1C and -2-2B engines, fitted with the affected turbine blades, comply with the latest revision of the requirement document. This involves not only replacing the blades but also potentially performing additional rework if the engine was previously modified under an earlier version of this directive (section 106.03). Additionally, operators must keep detailed records of compliance to demonstrate that the directive has been followed before the engine exceeds 1000 hours of operational time (section 106.04). Failure to comply with the provisions of this airworthiness directive can lead to significant consequences. The Civil Aviation Safety Authority has the authority to enforce compliance through various means, including the issuance of compliance orders or the imposition of fines. In severe cases, non-compliance can result in the grounding of the affected aircraft until the directive is met. Furthermore, operators who fail to comply may face civil penalties, which can include substantial fines and, in extreme circumstances, criminal charges leading to imprisonment. The exact penalties are determined by the severity of the non-compliance and are outlined in the broader framework of the Civil Aviation Regulations (section 106.05).