As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PERFORMANCE OF A ROUTINE 500 HR INSPECTION OF MAGNETO, A CRACK WAS DISCOVERED IN IMPULSE COUPLING BASE PLATE, IN LINE WITH FLYWEIGHT AXLE. CRACK DISCOVERED DURING NDT "MAG PARTICLE INSPECTION" OF PART. IMPULSE WES REPLACED WITH NEW PART.