AD/PA-23/57 - Wing Leading Edge - Modification - CANCELLED

What this is: This document officially cancels an old aviation safety rule (Airworthiness Directive AD/PA-23/57) that applied to Piper PA-23 Apache and Aztec aircraft.

What it originally required: Owners had to modify the wing leading edge according to Piper Service Bulletin No. 385 within 100 hours of flying time after June 1973.

What it means now: As of 12 February 2009, this requirement no longer applies. Owners and operators of these aircraft types no longer need to perform this specific modification to comply with Australian law.

Who cares: Anyone who owns, operates, or maintains Piper PA-23 series aircraft in Australia, or needs to know the regulatory history of these planes.