As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PRE-INSPECTION RUN-UP BY MECHANIC, FOUND UNUSUAL MAG DROP ON RIGHT MAGNETO REMOVED FOR TROUBLESHOOTING. FOUND THE POINT ASSY CONTACT LOOSE AND FALLING OUT OF SPRING ARM. REPLACED CONTACT ASSY. OPS CHECKED GOOD. THIS MAG HAD 184 HOURS SINCE A TCM OVERHAUL. THE MAGNETOS CAME ON A RECENTLY OVERHAULED TCM IO520 ENGINE. (X)