AD/DHA-3/6 - Fuel Filter - Modification - CANCELLED

What this does: This document officially cancels a 1953 aircraft safety rule that required owners of DHA-3 Drover aeroplanes to modify their fuel filter systems.

Who it affects: Owners and operators of DHA-3 (Drover) Series Aeroplanes — a type of small aircraft manufactured by de Havilland Australia in the late 1940s and early 1950s.

Why it matters: The original rule required removal of specific fuel filters (Part No. P3/341A) and installation of approved replacement filters to ensure flight safety. Because all affected aircraft have already completed this modification over the past 55 years, the rule is no longer needed. This cancellation notice formally removes the requirement, cleaning up the regulatory books.

Key point: If you own a Drover aircraft, you no longer need to worry about this specific fuel filter directive — though you must still comply with other current airworthiness requirements.