AD/PA-32/52 - Electric Pitch Trim Switch - Modification - CANCELLED

What this is: A cancellation notice for a previous aviation safety rule (called an Airworthiness Directive or AD).

What it originally required: Owners of Piper PA-32 (Cherokee Six) aircraft had to modify the electric pitch trim switch according to Piper Service Bulletin No. 556. This had to be done within 100 hours of flying time after October 1977.

What this document does: It officially cancels that safety requirement effective 25 September 2008. The rule is no longer in force.

Who it affects: Owners and operators of Piper PA-32 (Cherokee Six) series aeroplanes (though given the 1977 compliance deadline, most affected aircraft would have long since been modified).

Why it matters: The Civil Aviation Safety Authority has determined this particular safety modification is no longer necessary—likely because all affected aircraft have already been modified, the part has been redesigned, or the original safety risk no longer exists.