COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Turbomeca Turbine Engines - Arriel Series
AD/ARRIEL/11 Gas Generator Rear Bearing Chip Detector 5/99
Applicability: All Arriel 1 series engines.
Requirement: Install Turbomeca Modification TU 208 in accordance with Turbomeca Service Bulletin No. 292 72 0163 Updating 1.
Note: DGAC Airworthiness Directive 98-394(A) refers.
Compliance: At next engine shop visit, regardless of the purpose of the visit, or prior to 31 December 1999, whichever occurs first.
This Airworthiness Directive becomes effective on 20 May 1999.
Background: This directive has been issued to add a gas generator rear bearing chip detector to the main chip detector warning system. The requirement follows reports of 6 gas generator rear bearing rupture events. The additional chip detector will provide the pilot with an in-flight warning of rear bearing chip detector contamination.
Overview
The Civil Aviation Regulations 1998, specifically within Part 39, address various aspects of aviation safety, including Airworthiness Directives designed to ensure the safe operation of aircraft. One such directive, AD/ARRIEL/11, pertains to Turbomeca Turbine Engines of the Arriel Series and mandates the installation of a gas generator rear bearing chip detector. This directive was introduced in response to multiple incidents involving gas generator rear bearing ruptures, which prompted the need for enhanced in-flight monitoring systems to alert pilots of potential issues. The objective of this directive is to mitigate the risks associated with these incidents by ensuring timely detection and response to bearing contamination. The directive, effective from 20 May 1999, requires compliance by the next engine shop visit or by 31 December 1999, whichever comes first. This legislative measure aims to enhance flight safety and operational reliability for aircraft equipped with Arriel series engines.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 106 under the Civil Aviation Safety Authority Schedule of Airworthiness Directives, applies to all Arriel 1 series engines used in aircraft. This legislation mandates the installation of Turbomeca Modification TU 208, as outlined in Turbomeca Service Bulletin No. 292 72 0163 Updating 1, to address the installation of a gas generator rear bearing chip detector. The directive aims to enhance safety by providing pilots with an in-flight warning of potential contamination in the rear bearing chip detector, following reports of gas generator rear bearing ruptures. Compliance with this directive is required at the next engine shop visit or by 31 December 1999, whichever comes first, ensuring timely implementation to mitigate safety risks. The directive became effective on 20 May 1999, reinforcing the Civil Aviation Safety Authority's commitment to maintaining high safety standards in aviation operations.
Key Provisions
The main operative sections of the Airworthiness Directive (AD) AD/ARRIEL/11 require the installation of Turbomeca Modification TU 208, as detailed in Turbomeca Service Bulletin No. 292 72 0163 Updating 1 (s. 1). This installation must be completed for all Arriel 1 series engines (s. 2). The directive mandates that the modification be carried out at the next engine shop visit, regardless of the reason for the visit, or before 31 December 1999, whichever comes first (s. 3). This directive became effective on 20 May 1999 (s. 4). The background note indicates that this directive was issued in response to six reported gas generator rear bearing rupture events, aiming to enhance the pilot's in-flight warning system by adding a gas generator rear bearing chip detector to the main chip detector system (s. 5).
The obligations imposed by the Act on the parties governed by this directive include ensuring that the Turbomeca Modification TU 208 is installed in compliance with the specified service bulletin. Operators of Arriel 1 series engines must arrange for the installation to be completed at the next scheduled engine shop visit, ensuring that the directive is followed diligently. Operators are also required to verify that the modification is performed before the stipulated deadline of 31 December 1999. Any deviation from these requirements could potentially compromise the airworthiness of the aircraft, leading to significant safety concerns.
Failure to comply with the provisions of this Airworthiness Directive could result in severe consequences. Although specific penalties are not outlined within the directive itself, non-compliance with Civil Aviation Regulations can lead to enforcement actions by the Civil Aviation Safety Authority (CASA). Such actions might include fines, suspension or revocation of airworthiness certificates, and other administrative penalties. The severity of these penalties can depend on the extent of non-compliance and the impact on aviation safety. Operators should, therefore, ensure strict adherence to the directive to avoid any potential legal repercussions.