AD/PA-28/81 - Fuel Filter Drain Valve - Replacement - CANCELLED

What this does: This document officially scraps a previous aviation safety rule (Airworthiness Directive AD/PA-28/81) that required owners of Piper PA-28 aircraft to replace a specific fuel filter drain valve.

Who it affects: Owners and operators of Piper PA-28 series aeroplanes who were previously subject to the 1981 directive.

Why it matters: The Civil Aviation Safety Authority (CASA) confirms that every affected aircraft has already been modified, making the original rule redundant. As of 3 July 2008, owners no longer need to comply with this specific replacement requirement or maintain proof of past compliance.

Background: The original directive mandated a one-time replacement of the fuel filter drain valve within 100 hours of flying time after May 1981. After 27 years, the regulator recognises the entire fleet has been addressed, so the safety requirement is formally removed from the books.