COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Propellers - Variable Pitch - Dowty Rotol
AD/PR/11
Amdt 1
Blade Operating Pin - Inspection for Cracking NK
Applicability: As detailed in the requirement document.
Document: 1. Dowty Rotol Alert SBs No. 61-A733 (Model (c) R175/4-30-4/13E and No. 61- A740 (Model (c) R193/4-30-4/50 and 61); and
2. Dowty Rotol SB 61-711 Rev. 2 (All 4 bladed Nos. 20, 30 and 40 root size propellers fitted to RR Dart engined aircraft).
Compliance: As detailed in the requirement document.
Overview
The Civil Aviation Regulations 1998 were enacted to ensure the safety and efficiency of civil aviation within Australia. This legislative instrument, which forms part of the broader regulatory framework, aims to maintain the highest safety standards and operational efficiency in the civil aviation sector. The Civil Aviation Safety Authority (CASA) administers these regulations and issues Airworthiness Directives to address specific safety concerns. One such directive, AD/PR/11 Amendment 1, pertains to the inspection of blade operating pins for cracking in certain Dowty Rotol propellers, specifically those used in R175/4-30-4/13E, R193/4-30-4/50, and other 4-bladed propellers fitted to RR Dart engined aircraft. This directive was introduced in response to documented service bulletins from Dowty Rotol, highlighting the need for regular inspections to prevent potential safety hazards. The overarching policy objective is to ensure that aircraft meet the required safety standards, thereby protecting the public and maintaining the integrity of the aviation system.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 107, under the Civil Aviation Safety Authority Schedule of Airworthiness Directives, governs the maintenance and operational standards of propellers on aircraft within the Australian Commonwealth. This regulation applies to all aircraft operators and maintenance personnel who work on variable pitch propellers manufactured by Dowty Rotol. It particularly mandates inspections for blade operating pin cracking, as outlined in the relevant Service Bulletins (SBs) from Dowty Rotol. These include SBs No. 61-A733 for models R175/4-30-4/13E and R193/4-30-4/50, and SB 61-711 Rev. 2 for all four-bladed propellers of root sizes 20, 30, and 40 fitted to RR Dart engined aircraft. The geographic reach of this legislation is national, encompassing all aircraft registered in Australia, regardless of where they are operated within the country’s airspace. The Act extends its application through subordinate instruments, ensuring that specific and detailed compliance requirements are met by the relevant parties. There are no stated exclusions or exemptions within the provided text, meaning that all specified aircraft and propellers must comply with the outlined inspection and maintenance protocols.
Key Provisions
The Civil Aviation Regulations 1998, specifically in Part 39 - 107, detail the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives (ADs). One such directive, AD/PR/11 Amendment 1, focuses on the inspection of blade operating pins for cracking in Dowty Rotol variable pitch propellers (Section 1). This directive applies to specific propeller models, including the R175/4-30-4/13E, R193/4-30-4/50, and certain 4-bladed propellers fitted to RR Dart engined aircraft (Section 2). Compliance with these ADs is crucial for maintaining the airworthiness of these aircraft components, ensuring safety and reliability in aviation operations.
The obligations imposed by this directive are clear and specific. Operators and maintenance personnel must follow the detailed inspection procedures outlined in the requirement documents, which include Dowty Rotol Service Bulletins No. 61-A733, No. 61-A740, and SB 61-711 Rev. 2 (Section 3). These documents provide the necessary guidelines for identifying and addressing any cracking in the blade operating pins, a critical aspect of propeller integrity. Operators must ensure that these inspections are conducted regularly and that any identified issues are resolved promptly to maintain compliance with CASA standards.
Failure to comply with these airworthiness directives can lead to significant consequences. Non-compliance may result in the grounding of affected aircraft until the required inspections and repairs are completed. Moreover, CASA has the authority to impose penalties on operators who fail to adhere to these safety requirements. The specific penalties can include fines or other enforcement actions, reflecting the seriousness with which CASA treats the mandate for ensuring aircraft safety. The exact penalties are not specified in the legislation but are determined based on the severity and impact of the non-compliance.
In summary, the Civil Aviation Regulations 1998, through AD/PR/11 Amendment 1, mandate rigorous inspection procedures for specific Dowty Rotol propellers to prevent blade operating pin cracking. Operators must strictly adhere to these requirements to maintain the airworthiness of their aircraft. Non-compliance carries the risk of enforcement actions, including potential fines, highlighting the importance of diligent adherence to these safety directives.