Pilatus PC-12 airplanes must replace brake parts after a single brake lockup incident

The US aviation regulator is ordering specific Pilatus PC-12/47G airplanes to replace parts in their brake systems. This means owners and operators of these planes must install new brake pipe assemblies to prevent brake lockup.

A single incident of a brake shuttle valve failing on a production aircraft is enough for the US aviation regulator to mandate a fleet-wide part replacement. This shows how quickly a specific safety defect can trigger a costly, mandatory fix for aircraft manufacturers and operators. It also highlights the regulator's power to force changes based on even isolated failures.