AD/PA-28/74 - Fuel and Vapour Return Lines - Modification - CANCELLED

What this was: This was a safety rule (called an Airworthiness Directive or AD) for owners of Piper PA-28 series aircraft. It required a one-time mechanical modification to the fuel and vapour return lines to prevent potential safety hazards.

Who it affected: Owners and operators of Piper PA-28 series aeroplanes.

What had to be done: Aircraft owners had to modify their fuel systems according to Piper Service Bulletin No. 625 within 100 hours of flying time after January 1979.

Why it matters now: This rule has been cancelled (as of 3 July 2008) because all affected aircraft have already been modified. The document simply records that this safety requirement is no longer active and can be disregarded.