As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL 390 FLT DK AND CABIN HAD AN ODOR OF BURNING ELECTRIC WIRE. TURNED OFF UTILITY BUSES AND L/R RECIRC FAN, ODOR SUBSIDED. EQUIPMENT OVHT LIGHT THEN CAME ON. FOUND LEFT RECIRC FAN BLADES CONTACTING HOUSING CAUSING VIBRATION AND BURNING SMELL. REPLACED FAN PER M/M. INSPECTED AREA, NO EVIDENCE OF FIRE OR SMOKE.