As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHEN THE FLIGHT CREW ARRIVED AT THE AIRCRAFT (ON GATE WITH EXTERNAL POWER ON) THEY REPORTED A BURNING SMELL IN THE CABIN. THEY IMMEDIATELY TURNED OFF THE AIRCRAFT POWER. MAINTENANCE FOUND THE OVERHEADLIGHTING BALLAST FOR ROW 1 - R/H, HAD OVERHEATED AND BURNED OUT. THE BALLAST AND BULB WERE REPLACED AND CHECKED - SERVICEABLE. . .. .