As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 6817 - THE FIRST OFFICER LEFT FLOOR HEATER FAILED DURING PASSENGER BOARDING. F/O SAW SPARKS JUST LEFT OF THE YOKE ON THE FLOOR FOLLOWED BY SMOKE. CORRECTIVE ACTION: MAINTENANCE REPLACED THE LEFT FLOOR HEATER ON FIRST OFFICER SIDE. THE AIRCRAFT HAS RETURNED TO SERVICE. (LP #7576132)