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/3
Amdt 2
Free Turbine Containment Shield 7/95
Applicability: Arriel 1A, 1A1, 1B, 1D, 1D1 engines.
Requirement: Install a free turbine containment shield in accordance with the following requirements:
- Arriel 1A and 1A1 engines incorporating modification TU 13 but not incorporating modifications TU 99 and TU 215, action in accordance with Turbomeca Service Bulletins 292-72-0206 (TU 254) and 292-72-0208 (TU 259).
2. Arriel 1B and 1D engines not incorporating modifications TU 99 and TU 215, action in accordance with Turbomeca Service Bulletins 292-72-0206 (TU 254) and 292-72-0208 (TU 259).
3. Arriel 1A and 1A1 engines incorporating modifications TU 13 and TU 99, action in accordance with Turbomeca Service Bulletins 292-72-0207 (TU 255) and 292- 72-0208 (TU 259).
4. Arriel 1B, 1D and 1D1 engines incorporating modification TU 99, action in accordance with Turbomeca Service Bulletins 292-72-0207 (TU 255) and 292-72- 0208 (TU 259).
Note: DGAC Airworthiness Directive 95-069(B) refers.
Compliance: Effective 22 June 1995; at next disassembly of the free turbine module assembly.
Background: This Directive has been issued to require the installation of a containment shield to the free turbine module. The requirement is to prevent the release of turbine components in the event of an overspeed failure of the free turbine. This amendment reflects the requirements of DGAC Airworthiness Directive 95-069(B).
Overview
The Civil Aviation Regulations 1998, administered by the Civil Aviation Safety Authority (CASA), were enacted to ensure the safety of civil aviation in Australia. One particular legislative instrument within this framework is AD/ARRIEL/3Amdt 2, which pertains to the installation of a free turbine containment shield for specific Turbomeca Arriel Series engines. This legislative amendment was introduced to address the safety concern of potential overspeed failures of the free turbine, which could lead to the release of turbine components. The policy objective is to enhance the safety of air travel by mitigating risks associated with engine failure. Compliance with this directive is mandatory and became effective from 22 June 1995, requiring the installation of the containment shield at the next disassembly of the free turbine module assembly.
Scope and Application
The Civil Aviation Regulations 1998, specifically under PART 39 - 106 Civil Aviation Safety Authority Schedule of Airworthiness Directives, mandates the installation of a free turbine containment shield for certain Arriel Series Turbomeca turbine engines. This directive applies to Arriel 1A, 1A1, 1B, 1D, and 1D1 engines and requires compliance in accordance with specific Turbomeca Service Bulletins, contingent on the presence or absence of certain modifications within these engines. This requirement is designed to mitigate the risk of turbine component release in the event of an overspeed failure, thereby enhancing aviation safety. The directive is applicable at the next disassembly of the free turbine module assembly and has been in effect since 22 June 1995, aligning with the DGAC Airworthiness Directive 95-069(B). The scope of this regulation is confined to ensuring the airworthiness of the specified engines used in civil aviation operations within Australia, and it does not extend beyond these parameters unless otherwise specified through subordinate instruments.
Key Provisions
The key operative sections of the Civil Aviation Regulations 1998, particularly in Part 39, require the installation of a free turbine containment shield in Arriel Series turbomeca turbine engines. Specifically, section 106 of the schedule of airworthiness directives outlines the need for the installation of this shield to ensure safety in the event of an overspeed failure of the free turbine (AD/ARRIEL/3Amdt 2). The applicability of this directive is clearly stated for Arriel 1A, 1A1, 1B, 1D, and 1D1 engines. The requirement mandates the installation of a containment shield in accordance with detailed Turbomeca Service Bulletins and specifies actions based on the presence or absence of certain modifications.
The obligations imposed by this Act on the parties or entities it governs are stringent and precise. Operators of Arriel Series engines must ensure compliance with the specified Turbomeca Service Bulletins, which detail the exact procedures and modifications necessary for the installation of the containment shield. This includes adhering to the specific guidance provided for engines with various configurations of modifications TU 13, TU 99, and TU 215. The requirement applies at the next disassembly of the free turbine module assembly, which mandates meticulous attention to the timelines and conditions specified.
Failure to comply with the provisions of this directive may lead to significant legal consequences. The Civil Aviation Regulations 1998 do not explicitly state the penalties for non-compliance within the given text, but it is understood that breaches of airworthiness directives can result in severe repercussions, including the potential grounding of aircraft and financial penalties. Operators found to be in breach of these directives may face both civil and criminal liabilities, with the seriousness of the consequences depending on the extent of non-compliance and its impact on aviation safety.