As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 4251 - CREW REPORTED AN ELECTRICAL BURNING SMELL IN COCKPIT WITH NO VISIBLE SMOKE NOTED. AN EMERGENCY WAS DECLARED AND AIRCRAFT RETURNED TO ORD WITHOUT FURTHER INCIDENT REPORTED. MAINTENANCE FOUND A BURNED NOSE LANDING LIGHT CONTACTOR. WHICH WAS REPLACED IAW EMB MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)