As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED SMOKEY SMELL IN THE COCKPIT, DECLARED AN EMERGENCY AND RETURNED TO MKE WITHOUT INCIDENT. MAINTENANCE PERFORMED INSPECTION OF ENG AND PERFORMED ENG RUNS PER EMB AMM, AND COULDN'T DUPLICATE THE ODOR. A/C WAS RELEASED INTO SERVICE.