AIRWORTHINESS DIRECTIVE
On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/PR/6 Amdt 11 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.
Propellers - Variable Pitch - Dowty Rotol
AD/PR/6
Amdt 12
Retirement Lives of Components 13/2004
Applicability: As detailed in the Requirement Documents.
Note: The aeronautical products as detailed in the Requirement Documents are propeller components fitted to Rolls Royce Dart Series Engines.
Requirement: As applicable, retire listed propeller components in accordance with the following documents or later approved revisions as approved by the UK CAA.
- Dowty Rotol SB No 61-542-1;
2. Dowty Rotol SB No 61-542-2, Rev. 2;
3. Dowty Rotol SB No 61-542-3, Rev. 2;
4. Dowty Rotol SB No 61-542-3A, Rev. 1;
5. Dowty Rotol SB No 61-542-4;
6. Dowty Rotol SB No 61-542-5;
7. Dowty Rotol SB No 61-542-6, Rev. 2;
8. Dowty Rotol SB No 61-542-10, Rev. 3;
9. Dowty Rotol SB No 61-542-11;
10. Dowty Rotol SB No 61-542-13, Rev. 1.
11. Retire all propeller hub and driving centre assemblies listed in Dowty Aerospace Gloucester (formely Dowty Rotol) B 61-542-18, Rev 3, before exceeding 33,000 total time in service.
12. Dowty Aerospace Gloucester (Formel Dowty Rotol) SB No 61-954 Rev. 6. Compliance: As detailed in the Requirement Documents.
This Amendment becomes effective on 23 December 2004.
Propellers - Variable Pitch - Dowty Rotol
AD/PR/6 Amdt 12 (continued)
Background: This amendment clarifies that the types of propellers and propeller components detailed in this Directive are those fitted to Rolls Royce Dart Series engines. In addition the revision status of the requirement documents can now reflect the documents latest revision.
James Coyne
Delegate of the Civil Aviation Safety Authority 9 November 2004
The above AD is notified in the Commonwealth of Australia Gazette on 1 December 2004.
Overview
The Civil Aviation Safety Authority (CASA) introduced Airworthiness Directive AD/PR/6 Amdt 12, effective from 23 December 2004, to address the need for specific propeller components retirement lives of variable pitch propellers fitted to Rolls Royce Dart Series engines. This amendment, signed by James Coyne as a delegate of CASA, was intended to clarify the applicability and retirement requirements of the listed propeller components, ensuring compliance with the latest revisions of the requirement documents as approved by the UK Civil Aviation Authority (CAA). The directive was enacted to maintain the airworthiness of aircraft by ensuring that the specified propeller components are retired at the appropriate times, thus mitigating any potential safety risks associated with the continued use of these components beyond their designated service lives.
This legislative instrument was issued under the authority of the Civil Aviation Act 1988, reflecting the policy objective of enhancing aviation safety through the regulation of airworthy standards and the enforcement of airworthiness directives. The directive was published in the Commonwealth of Australia Gazette on 1 December 2004 to inform relevant stakeholders of the new requirements and compliance timelines.
Scope and Application
The Airworthiness Directive (AD) AD/PR/6 Amdt 12, issued by the Civil Aviation Safety Authority (CASA), applies specifically to propeller components fitted to Rolls Royce Dart Series engines, as detailed in the requirement documents. This AD is effective as of 23 December 2004 and mandates that these components be retired in accordance with specified service bulletins from Dowty Rotol and Dowty Aerospace Gloucester, as approved by the UK Civil Aviation Authority (CAA). The requirement to retire these components is contingent on their total time in service, with specific emphasis on propeller hub and driving centre assemblies, which must be retired before reaching 33,000 hours of total time in service. This directive ensures that the specified components meet airworthiness standards, thereby enhancing the safety of aircraft operations. The AD extends its jurisdictional reach within the Commonwealth of Australia, ensuring compliance across all relevant aviation sectors and entities involved in the maintenance and operation of the specified aircraft.
Key Provisions
The Airworthiness Directive AD/PR/6 Amdt 12, issued by the Civil Aviation Safety Authority (CASA) delegate, revokes the previous AD/PR/6 Amdt 11 and applies specifically to propeller components fitted to Rolls Royce Dart Series Engines (section 1). The directive mandates that these components be retired in accordance with specific service bulletins issued by Dowty Rotol or Dowty Aerospace Gloucester, as detailed in the Requirement Documents (section 2). Compliance with these directives is contingent on adhering to the specific instructions and timelines provided within the referenced documents (section 3).
This Act imposes clear obligations on aircraft operators and maintenance entities to ensure that propeller components are retired in accordance with the specified service bulletins (section 2). Operators must comply with the requirements as outlined in the directive, ensuring that all propeller components are retired or inspected as per the detailed instructions provided by Dowty Rotol and Dowty Aerospace Gloucester (section 3). The directive explicitly references several service bulletins, including Dowty Rotol SB No 61-542-1, Dowty Rotol SB No 61-542-2, Rev. 2, Dowty Rotol SB No 61-542-3, Rev. 2, and others, which must be followed to ensure compliance (section 2).
Failure to comply with the provisions of this Airworthiness Directive can lead to serious consequences. The directive does not explicitly state penalties but implies that non-compliance could result in aircraft being deemed unsafe for operation, leading to potential grounding and legal repercussions. Operators must ensure that all components are retired or inspected as per the specified service bulletins to avoid any regulatory penalties or operational issues (section 3). The directive's effective date is 23 December 2004, and it was published in the Commonwealth of Australia Gazette on 1 December 2004 (section 5).