As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CRUISE FLIGHT, GEN 2 TRIPPED OFF LINE. PILOT TRIED TO RESET WITH NO SUCCESS, AND THEN RETURNED TO BASE. INVESTIGATION REVEALED THE ARMATURE TO BE VERY DIRTY. ARMATURE CLEANED, AIRCRAFT GROUND RUN AND FUNCTION TEST PREFORMED SATISFACTORY.