As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PARKED AT GATE DURING BOARDING, CAPTAIN AND FIRST OFFICER SMELLED A HOT ELECTRICAL OR MELTING PLASTIC BURNING ODOR IN THE COCKPIT. PASSENGERS WERE DEPLANED. MAINTENANCE PERFORMED AMDS WC 2120-2367 WITH NO TROUBLE FOUND. DURING TROUBLESHOOTING, MAINTENANCE FOUND THE FIRST OFFICER`S OVERHEAD FLOOD LIGHT BURNED OUT. REPLACED. A DUCT BURNOUT WAS PERFORMED. THE AIRCRAFT WAS RETURNED TO SERVICE.