AD/R22/17 - Clutch Lock Switch - Modification - CANCELLED

What this does: This document officially scraps a previous aviation safety rule (called an Airworthiness Directive) that applied to Robinson R22 helicopters.

What the old rule required: The cancelled rule had required helicopter owners to modify a specific part known as the "clutch lock switch" within 25 hours of flying time after April 1983, following the manufacturer's safety bulletins.

Who it affects: Owners and operators of Robinson R22 series helicopters who were previously subject to the old directive.

Why it matters: As of 7 May 2009, helicopter owners no longer need to perform this specific modification to comply with this particular safety directive. The safety concern has been resolved or is now managed through other means, so the rule has been removed to reduce unnecessary regulatory burden.