As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING POSTFLIGHT CHECKS THE MAINTENANCE TEAM DISCOVERED A LEFT GENERATOR CONTROL UNIT (GCU) GROUND FAULT. THE MAINTENANCE VENDOR DISCOVERED A WIRING ISSUE AT THE PT003 AND JT003 CONNECTORS, PINS R AND S. THE PINS WERE REMOVED FROM THE CONNECTORS AND REPLACED WITH NEW PINS. OPS CHECKS WERE SATISFACTORY AND NO GROUND FAULTS FOUND. AIRCRAFT WAS RETURNED TO SERVICE