As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - CREW REPORTED EQUIPMENT VENT FAN STATUS MESSAGE IN CRUISE. PILOTS SEATED IN FIRST CLASS REPORTED ELECTRICAL SMELL AROUND THE TIME THE COCKPIT CREW RECEIVED THE STATUS MESSAGE. REPLACED THE EQUIPMENT COOLING VENT FAN. SYSTEM GROUND CHECKED NORMAL OPERATION.