As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - CREW REPORTED ON CLIMBOUT ELECTRICAL FUMES IN COCKPIT AND MID TO AFT CABIN. QRH ACCOMPLISHED AND ODOR DISSIPATED IN CABIN BUT NOT IN COCKPIT. EMERGENCY DECLARED FLIGHT RETURNED ORD LANDED WITHOUT INCIDENT. FUMES DISSIPATED BY ARRIVAL. AIRCRAFT REMOVED FROM SERVICE. REPLACED RIGHT AND LEFT RECIRCULATION FANS. SYSTEM GROUND CHECK NORMAL OPERATION.