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/8 Hub Driving Centre - Modification NK
Applicability: All model (c) R184/4-30-4/50, (c) R193/4-30-4/50 and /61.
Document: Dowty Rotol Mod. No. (c) VP 2486 (SB Nos. 61-573A and 61-573B refer). Compliance: Propeller model (c) R184/4-30-4/50.
(a) for hubs which have exceeded 2500 hours total time in service on 30 July 1968 - modify not later than 1 January 1969;
(b) for hubs which have completed less than 2500 hours time in service - modify before exceeding 2500 hours time in service.
Propeller model (c) R193/4-30-4/50 and /61 - before installation following next overhaul completed after 30 July 1968.
Overview
The Civil Aviation Regulations 1998, as part of a legislative instrument numbered F2006B06336, address the critical need to ensure the safety and airworthiness of aircraft propellers within the Australian aviation sector. Enacted by the Commonwealth of Australia, these regulations aim to establish stringent safety standards and compliance requirements to mitigate risks associated with the operation of civil aircraft. The policy objective of this legislation is to mandate specific modifications to Dowty Rotol propellers, particularly for models (c) R184/4-30-4/50, (c) R193/4-30-4/50, and /61, to ensure their continued safe operation. This legislative measure was introduced to address potential safety issues that could arise from the degradation of propeller hubs over time, requiring timely modifications based on their total time in service. The Civil Aviation Safety Authority, through this regulation, ensures that these safety directives are effectively implemented to protect the public and maintain high standards in civil aviation.
Scope and Application
The Civil Aviation Regulations 1998, as amended, and more specifically, Part 39 – 107, detail the Civil Aviation Safety Authority’s schedule of airworthiness directives which govern the maintenance and modification of aircraft components to ensure they meet specified safety standards. One such directive, AD/PR/8, pertains to propellers with variable pitch manufactured by Dowty Rotol, specifically targeting modifications to the hub driving centre. This directive applies to propeller models (c) R184/4-30-4/50, (c) R193/4-30-4/50, and /61. The regulation mandates that for propeller hubs that have exceeded 2500 hours of total time in service as of 30 July 1968, the required modification must be completed by 1 January 1969. For hubs with less than 2500 hours of service by that date, the modification must be executed before the 2500-hour threshold is reached. Additionally, propeller models (c) R193/4-30-4/50 and /61 must undergo the specified modification before installation following any overhaul completed after 30 July 1968. The directive encompasses all aircraft operators and maintenance personnel within the Commonwealth of Australia, ensuring compliance with the safety standards set by the Civil Aviation Safety Authority.
Key Provisions
The Civil Aviation Regulations 1998, particularly in Part 39, impose specific requirements for airworthiness directives related to propellers. Section 107 of the regulations details the modifications that must be made to the hub driving centre of certain Dowty Rotol propellers. The pertinent section in this context is AD/PR/8, which mandates modifications to hubs of the models (c) R184/4-30-4/50, (c) R193/4-30-4/50, and /61. The directive references Dowty Rotol Modification No. (c) VP 2486, with service bulletins 61-573A and 61-573B providing additional details.
These modifications are crucial for ensuring the safety and airworthiness of the aircraft. Specifically, for propeller model (c) R184/4-30-4/50, the regulation requires that if the hub has accumulated more than 2500 hours of service by 30 July 1968, it must be modified by 1 January 1969. If the hub has fewer than 2500 hours of service, the modification must be performed before it reaches 2500 hours. For the propeller models (c) R193/4-30-4/50 and /61, the modification must be made before installation following the next overhaul completed after 30 July 1968.
The obligations imposed by these provisions are clear and specific. Operators and owners of aircraft equipped with the specified propeller models must adhere to the timelines and conditions set forth in the directive to maintain compliance with airworthiness standards. Failure to comply with these modifications can lead to significant consequences. The Civil Aviation Regulations 1998 outline that non-compliance with airworthiness directives can result in serious penalties. These may include fines and, in severe cases, criminal charges. The maximum penalties for non-compliance can vary, but they are designed to ensure that all aircraft meet the necessary safety standards to protect passengers, crew, and the general public. It is crucial for all parties involved to be aware of and adhere to these regulations to avoid any legal repercussions.