AD/BELL 412/35 - Tail Boom Doubler and Fin Spar Caps - CANCELLED

What this is: This document officially cancels a previous airworthiness directive (safety rule) for Bell 412 helicopters.

Who it affects: Owners and operators of Bell Helicopter Textron 412 series helicopters.

What it does:

• Removes inspection requirements: It cancels the previous rule (AD/BELL 412/35) that required regular inspections of the tail boom doubler and fin spar caps (structural parts of the helicopter's tail section).
• Why now: The original rule required these inspections only until a permanent fix ('terminating action') was completed. That deadline was January 1996—over a decade ago—so the inspection requirement is no longer necessary.

In short: If you fly or own a Bell 412 helicopter, you no longer need to follow the specific inspection schedule outlined in the old Alert Service Bulletin 412-93-74 for these parts.