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

What this is: This document officially cancels an existing aviation safety rule (called an Airworthiness Directive or AD) that previously required special inspections of propeller parts on specific aircraft.

What it did: The original rule required owners to inspect the blade sockets (the fittings that hold the propeller blades) on Dowty Rotol variable-pitch propellers. These specific propellers were only installed on Armstrong-Whitworth Argosy 222 aircraft.

Who it affects: Anyone who operates these specific aircraft. However, since this document cancels the rule effective 19 November 2009, no one needs to follow this inspection requirement anymore.

Why it matters: The safety risk that originally justified these inspections no longer exists—likely because these aircraft are no longer flying in Australia. This removes an unnecessary regulatory burden and compliance cost for operators.