As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT DIVERTED FOR SMOKE ODOR IN FORWARD CABIN AND FLIGHT DECK. EMERGENCY DECLARED. CREW OFF UTILITY BUSS AND ODOR SLOWLY DISSIPATED. REPLACED LEFT RECIRCULATION FAN IAW AMM 21-25-01. REPLACED LEFT RECIRCULATION FILTER. REPLACED RELAY K415 AND SYSTEM 1 AIR GROUND K124. PERFORMED RESET OF EXHAUST VALVE AND SMOKE SYSTEM. ACFT RETURNED TO SERVICE.