As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2134 PASSENGER AND FLIGHT ATTENDANT ADVISE THAT THEY SMELL ELECTRICAL BURNING ODOR NEAR ROW 4. MAINTENANCE INSPECTED PASSENGER LIGHT CONNECTIONS PSU'S FOUND NO SIGN OF BURNING OR ANY BURNING ODOR NEAR OR AROUND ROW 4. POSSIBLY COMING FROM DEICE TRUCK AT FRONT OF PLANE WHICH WAS SMOKING. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.