COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/DART/23 and issues the following AD under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.
Rolls Royce Turbine Engines - Dart Series
AD/DART/23
Amdt 1
Low Pressure Turbine Disc 10/2003
Applicability: Dart 520, 525, 526, 527, 528, 529, 530, 531, 532, 533, 534, 535, 536, 542, 543, 550
and 552 series engines.
Requirement: Action in accordance with Rolls Royce Alert Service Bulletin (ASB) Da72-A512.
This Directive supersedes the requirements of AD/ENG/7 with respect to Low Pressure Turbine (LPT) disc lives for the applicable Rolls Royce Dart series engines.
Compliance: As detailed in the Requirement document.
This Amendment becomes effective on 2 October 2003.
Background: The original issue of this Directive was raised to limit the cyclic lives of certain LPT discs following advice that four LPT disc failure events had occurred in-service between 1985 and 1989. This Amendment does not alter the technical requirements of this Directive but replaces reference to cancelled AD/DART/1 with AD/GEN/7 together with minor editorial changes.
The original issue of this Airworthiness Directive became effective on 5 October 1989.
Jim Coyne
Delegate of the Civil Aviation Safety Authority 19 August 2003
The above AD is notified in the Commonwealth of Australia Gazette on 10 September 2003.
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Overview
The Civil Aviation Safety Regulations 1998 (CASR 1998) are a cornerstone of Australia's aviation safety framework, enacted to ensure the safety of aircraft and aeronautical products operating within the country's airspace. These regulations are administered by the Civil Aviation Safety Authority (CASA), which is responsible for overseeing compliance and issuing directives to mitigate safety risks. One such directive, AD/DART/23, was introduced to address safety concerns related to the low-pressure turbine (LPT) discs in specific Rolls Royce Dart series engines. This directive was necessitated by a series of in-service failures that occurred between 1985 and 1989, highlighting a need for stringent control over the cyclic lives of these LPT discs. The policy objective behind this directive is to ensure the airworthiness of affected aircraft by enforcing corrective actions as specified in the Rolls Royce Alert Service Bulletin (ASB) Da72-A512, thereby maintaining high safety standards in the aviation industry.
Scope and Application
The Civil Aviation Safety Regulations 1998, specifically under Part 39 - 106 and the Civil Aviation Safety Authority Schedule of Airworthiness Directives, applies to the specified Rolls Royce Turbine Engines Dart series, namely Dart 520, 525, 526, 527, 528, 529, 530, 531, 532, 533, 534, 535, 536, 542, 543, 550, and 552 series engines. This directive, issued by the Civil Aviation Safety Authority (CASA) delegate, mandates that action be taken to address the unsafe condition of certain Low Pressure Turbine (LPT) discs in the mentioned engines, as per the requirement set out in Rolls Royce Alert Service Bulletin (ASB) Da72-A512. The directive replaces the requirements of AD/ENG/7 regarding LPT disc lives for the applicable Rolls Royce Dart series engines, and it becomes effective on 2 October 2003. The directive is applicable across the Commonwealth of Australia, applying to all relevant aircraft operators and maintenance entities utilising the specified engines. There are no stated exclusions or exemptions within the text of this directive, though compliance must be achieved as detailed in the requirement document. This Airworthiness Directive extends its application through subordinate instruments, such as the Alert Service Bulletins, which provide the technical specifications and instructions for addressing the identified unsafe condition.
Key Provisions
The Civil Aviation Safety Regulations 1998, specifically under PART 39 - 106, mandates the issuance of Airworthiness Directives (ADs) to ensure the safety of aircraft and aeronautical products. Section 39.1(1) allows the Civil Aviation Safety Authority (CASA) delegate to revoke existing directives and issue new ones based on identified safety concerns. This particular AD, AD/DART/23 Amendment 1, applies to specific Rolls Royce Turbine Engines, namely the Dart 520 to 552 series engines (section 10). The directive requires action to be taken in accordance with Rolls Royce Alert Service Bulletin (ASB) Da72-A512, which details the necessary steps to address the unsafe condition identified in the low-pressure turbine (LPT) discs (section 2).
The obligations imposed by this AD include the mandatory compliance with the Rolls Royce Alert Service Bulletin Da72-A512 for the specified engines (section 2). Operators and owners of the affected aircraft must ensure that the prescribed actions are performed to mitigate the identified safety risks. These actions must be carried out in accordance with the instructions provided in the requirement section of the AD and within the timeframe specified in the compliance section. This ensures that all stakeholders are aware of the necessary steps and deadlines to maintain the airworthiness of the aircraft.
Breach of the requirements set out in this Airworthiness Directive can lead to serious consequences. Under the Civil Aviation Act 1988, non-compliance with ADs is considered an offence. The potential penalties include fines and imprisonment, reflecting the gravity of the safety issues involved. The maximum penalties for non-compliance with airworthiness directives are significant, underscoring the importance of adherence to the regulations to ensure the safety of aviation operations. Failure to comply with this directive could result in the grounding of affected aircraft, leading to operational disruptions and potential safety hazards.