As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, FLIGHT CREW NOTICED AN ELECTRICAL ODOR ON THE AIRCRAFT WHICH PRECEDED AN EICAS MESSAGE EQUIPMENT OVERHEAT. FLIGHT CREW PERFORMED COM PROCEDURE AND DECLARED AN EMERGENCY. FLIGHT DIVERTED TO DTW FOR AN UNEVENTFUL LANDING. MAINTENANCE REPLACED THE NR 1 EQUIPMENT COOLING FAN, OPERATIONAL CHECK OK.