As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLIGHT ATTENDANTS REPORTED DURING CLIMBOUT ELECTRICAL ODOR. EMERGENCY DECLARED, FLIGHT RETURNED ORD LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. ACCOMPLISHED PACK BURN AND FUNCTIONAL CHECK FLIGHT WITH NO SMOKE OR ODOR NOTED. SYSTEM GROUND CHECK NORMAL OPERATION.