As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE - FLT 2150 - THE CREW REPORTED A ELECTRICAL SMELL BY THE OVERWING EXIT DURING TAXI. THE AIRCRAFT RETURNED TO THE GATE WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AND REPLACED THE LIGHTING BALLAST AT ROW 12A. OPERATIONAL CHECKS WERE GOOD.