As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PASSENGERS DEPLANED DUE TO HEAVY SMOKE SMELL EMANATING THROUGHOUT THE CIOCKPIT. FOUND COCKPIT GCU BURNED OUT, REPLACED. GCU CHECKED AND NOT AT FAULT AND REINSTALLED THREE DAYS LATER SAME PROBLEM. UNIT SENT TO MANUFACTURER FOR INVESTIGATION.