As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BUF-FLIGHT 3597 CREW REPORTED A BURNING SMELL IN THE CABIN, PROMINENT AROUND SEATS 4DF & 5DF. MAINTENANCE FOUND THE PLUNGER ABOVE 4DF OVERHEAD LIGHT WAS MELTED. PLUNGER AND SOCKET ASSEMBLY WERE REPLACED. OPERATIONAL CHECK WAS GOOD. AIRCRAFT WAS RETURNED TO SERVICE.