AD/PA-42/1 - Powerplant Firewall - Inspection - CANCELLED

This document cancels a previous aviation safety rule that required inspection of the powerplant firewall on Piper PA-42 (Cheyenne III) aircraft.

Who it affects:

• Owners and operators of Piper PA-42 (Cheyenne III) series aeroplanes
• Maintenance organisations servicing these aircraft

What it does:

• Removes the mandatory requirement to inspect for unplugged holes in the firewall
• Cancels the previous Airworthiness Directive that mandated this check in accordance with manufacturer Service Bulletin No. 727

Why it matters: Operators are no longer legally required to perform this specific inspection, reducing maintenance obligations for this aircraft type. The cancellation reflects that the safety issue is no longer considered a current risk requiring regulatory intervention.