AD/PT6A/18 - No. 2 Bearing Oil Pressure Tube

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of the Commonwealth of Australia, are fundamental to ensuring the safety and efficiency of civil aviation within the country. Among the various provisions detailed in the Regulations, Part 39 focuses on Airworthiness Directives, which are legally enforceable rules that aim to correct an unsafe condition on an aircraft. Specifically, AD/PT6A/18 addresses the Pratt and Whitney Canada PT6A Series turbine engines, particularly models PT6A-38, PT6A-41, and PT6A-45A, to ensure that they meet safety standards through the inspection and replacement of the bearing oil pressure tube within 100 hours of service after 28 February 1978. This directive was introduced to address specific safety concerns identified with these engine models, aiming to prevent potential mechanical failures and ensure the continued safe operation of affected aircraft.

Scope and Application

The Civil Aviation Safety Authority Schedule of Airworthiness Directives, specifically AD/PT6A/18, pertains to Pratt and Whitney Canada Turbine Engines of the PT6A series, particularly those with serial numbers as specified in the requirement document. This applies to PT6A-38, PT6A-41, and PT6A-45A engines. The directive requires compliance within 100 hours of time in service after 28 February 1978. This regulation applies to all entities and persons who operate or maintain these specified engines, ensuring that they adhere to the maintenance and operational standards outlined by the Civil Aviation Safety Authority. The geographic and jurisdictional reach of this regulation is under the Commonwealth of Australia, administered by the Civil Aviation Safety Authority, thereby covering all civil aviation activities within the nation. There are no exclusions or exemptions mentioned in the directive; it applies universally to the specified engines within the stipulated timeframe. Any further extension or restriction of application is typically addressed through subordinate instruments issued by the Civil Aviation Safety Authority.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 106, mandates the Civil Aviation Safety Authority (CASA) to issue Airworthiness Directives (ADs) to ensure the safety of aircraft operations. One such AD is AD/PT6A/18, which pertains to the Pratt and Whitney Canada Turbine Engines of the PT6A Series, particularly focusing on the No. 2 bearing oil pressure tube (section 10/85). This directive applies to specific models of the PT6A series, namely PT6A-38, PT6A-41, and PT6A-45A engines, and is relevant to those with serial numbers specified in the requirement document (section 10/85). The directive outlines the requirements for maintaining the airworthiness of the specified engines. Owners or operators of these engines must comply with the directive by following the instructions provided in either Pratt & Whitney of Canada Service Bulletin No. 3099, Revision 2, or AD/UAC-T/28A (section 1). Compliance must be achieved within 100 hours of time in service after 28 February 1978 (section 1). The purpose of this directive is to update the listing of affected engine serial numbers and to provide new part assembly instructions, ensuring that the engines meet the latest safety standards. The obligations imposed on the parties governed by this directive include ensuring that the specified engines are inspected and maintained in accordance with the provided documentation. This involves meticulous adherence to the procedures outlined in the referenced service bulletin or AD. Failure to comply with these requirements may result in the engine being deemed unairworthy, potentially leading to grounding of the aircraft until the necessary actions are taken. Such compliance is crucial to maintaining the safety and airworthiness of the aircraft, thereby ensuring the safety of all persons on board. The Civil Aviation Regulations 1998 also stipulate the consequences for non-compliance with ADs. Any breach of the requirements outlined in AD/PT6A/18 may result in severe penalties. Civil penalties can include fines and, in some cases, the grounding of the aircraft until the necessary corrective actions are completed. Additionally, continued operation of an aircraft with a non-compliant engine can lead to criminal charges, which may result in substantial fines and imprisonment. The specific penalties depend on the severity of the breach and the impact on aviation safety. The regulations aim to ensure that all stakeholders are aware of their obligations and the potential consequences of non-compliance.