AD/PR/21 - Hub Assembly - Inspection of Blade Sockets

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, are a comprehensive set of rules designed to ensure the safety and efficiency of civil aviation within the country. One particular aspect of these regulations is the management of airworthiness directives through the Civil Aviation Safety Authority (CASA). The specific legislative instrument F2006B06320, which pertains to AD/PR/21 concerning the inspection of blade sockets in Dowty Rotol propellers, was introduced to address issues related to the structural integrity of propeller components. The policy objective of this directive is to ensure the continued airworthiness and safety of aircraft by mandating regular inspections and maintenance of critical components such as the propeller hub assembly. This proactive approach helps in the early detection of potential defects, thereby preventing in-flight failures and enhancing overall aviation safety.

Scope and Application

The Civil Aviation Regulations 1998, under Part 39 - 107, specifically within the Civil Aviation Safety Authority Schedule of Airworthiness Directives, mandates particular inspection protocols for certain propellers. This directive applies to all model R212/4-30-4/22/1 propellers, commonly referred to as Argosy 222, which have not been modified in accordance with Modification VP 2388. The primary requirement is a visual inspection using a 3X magnifying glass to detect any cracks on the complete accessible exterior surface of the hub part number RA60600, with a particular focus on the areas between the blade sockets and the rear half circumference of the sockets. This inspection must be conducted within 25 hours of time in service after 1 November 1978. The regulation sets forth a clear compliance deadline, ensuring that these inspections are carried out to maintain the airworthiness of the aircraft to which these propellers are fitted.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 – 107, establish the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives. This includes AD/PR/21, which pertains to the inspection of blade sockets in the hub assembly of certain propellers. The directive applies to all model R212/4-30-4/22/1 propellers (Argosy 222) that have not been modified according to Modification VP 2388 (section 39 – 107). The requirement is for a thorough visual inspection of the hub's exterior surface, particularly focusing on the areas between the blade sockets and the rear half of the sockets, using a 3X magnifying glass to detect any cracks. This inspection must be completed within 25 hours of time in service after 1 November 1978. Under the Civil Aviation Regulations 1998, operators and owners of the specified propellers are obligated to ensure that the required inspection is performed as stipulated in the Airworthiness Directive. This involves using a 3X magnifying glass to examine the complete accessible exterior surface of the hub, with a focus on potential crack detection in the designated areas. The compliance timeline requires the inspection to be carried out within 25 hours of time in service following the directive's effective date of 1 November 1978. Failure to adhere to these inspection requirements could potentially compromise the safety and airworthiness of the aircraft, leading to non-compliance with regulatory standards. Failure to comply with the specified inspection requirements may result in significant consequences. The Civil Aviation Regulations 1998 impose penalties and consequences for non-compliance with airworthiness directives, which may include enforcement actions, fines, or other regulatory measures. These penalties are designed to ensure that aircraft maintain the highest safety standards and that operators and owners take their regulatory obligations seriously. The specific penalties for non-compliance are not detailed in the provided text, but they can include significant fines and potential grounding of the aircraft until compliance is achieved. The regulations underscore the importance of adhering to the Airworthiness Directive to ensure the continued safety and airworthiness of the aircraft. Non-compliance with these directives can lead to serious civil and criminal consequences, including financial penalties and potential criminal charges for those responsible for the oversight of the aircraft. The specific maximum penalties are not provided in the extract, but they are intended to enforce strict adherence to safety regulations within the aviation industry. Operators and owners must take all necessary steps to ensure that the required inspections are performed in a timely and accurate manner to avoid any legal repercussions.