As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT DIVERTED, DUE TO STRONG ELECTRICAL FUMES EXPERIENCED IN CRUISE. THERMAL IMAGES INSP WAS CARRIED OUT BY THE STA FIRE SERVICE. NO ABNORMAL HEAT SOURCE FOUND IN THE COCKPIT OR ELECTRICAL BAY. THE FWD EQUIPMENT EXHAUST FAN WAS ISOLATED AS THE PROBLEM SOURCE. MX PLACED THE EQUIPMENT EXHAUST FAN ON MEL 21-58-04.