As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT DIVERTED TO BWI DUE TO A HOT PLASTIC SMELL IN THE CABIN. THE UTILITY BUS WAS TURNED OFF AND THE SMELL DISSIPATED. NO SMELL FOR THE REMAINING 40 MINUTES. MAINTENANCE FOUND A MELTED SERVING TRAY IN NR 1 MID GALLEY OVEN. REMOVED TRAY RAN PACKS, VIDEOS, LIGHTS, OVENS AND COFFEEMAKERS FOR 1 HOUR NO SMELLS DETECTED. OKAY FOR SERVICE.