As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNUSED RECTIFIER POST BECOME LOOSE AND FELL INTO BOTTOM OF ALTERNATOR CASE. VIBRATION CAUSED LOOSE BOLT TO SHORT STATOR WINDINGS AND INTERMITTENTLY CAUSE DISCHARGE SPIKE IN BUS SYSTEM SPIKE WOULD CAUSE AVIONICS TO TURN OFF AND LOOSE NAVIGATION INFORMATION.