As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOTS REPORTED A PARALLELING PROBLEM WITH THE GENERATORS. INSPECTION REVEALED BOTH STARTER/GENERATOR GROUND CONNECTIONS WERE LOOSE. MINOR ARCING WAS NOTED ON LEFT GROUND. BOTH CONNECTIONS WERE CLEANED AND RESEATED. THIS CONDITION RESULTED FROM IMPROPER TORQUE OF ATTACHING HARDWARE.