As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE/SMELL - DURING GROUND RUNS AFTER MX CHECK AND PRIOR TO ENPLANEMENT OF PASSENGERS SMOKE/SMELL WAS REPORTED IN THE COCKPIT. SUBSEQUENT MAINTENANCE CHECKS OF SYSTEMS AND ENGINE RUNS DID NOT PRODUCE ANY RESULTS. MAINTENANCE COULD NOT DUPLICATE REPORT.