As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 3116 THE CREW REPORTED A LIGHT HAZE AND ELECTRICAL BURNING SMELL IN COCKPIT DURING TAXI. THE AIRCRAFT RETURNED TO THE GATE WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AND REPLACED THE LEFT GROUND COOLING FAN. OPERATIONAL CHECKS WERE GOOD. MAINTENANCE ALSO INSPECTED THE NR 1 AND NR 2 ENGINES. NO DEFECTS WERE NOTED. THE AIRCRAFT WAS RELEASED FOR SERVICE.