As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRICAL ODOR IN THE CABIN & COCKPIT. ODOR STOPPED WHEN UTILITY BUSES WERE TURNED OFF. EMER DECLARED FLIGHT RETURNED & LANDED WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. INSPECTED ACFT WITH UTILITY BUSES & RECIRCULATION FANS ON WITH NO FAULTS NOTED. SYS GND CHECKED NORMAL OPERATION CLOSED.