As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3777 THE CREW REPORTED SMOKE COMING FROM THE CAPTAIN SIDE WINDSHIELD HEAT TERMINAL BLOCK. THE AIRCRAFT WAS REMOVED FROM SERVICE. TROUBLESHOT AND FOUND SOURCE OF ODOR COMING FROM LEFT WINDSHIELD HEAT SYSTEM DEACTIVATED AND DEFERRED PER MEL 30-15. REMOVED AND REPLACED CAPTAIN'S WINDSCREEN IAW CRJ MM 56-11-01. OPERATIONAL AND LEAK CHECKS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.