As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT FLIGHT ATTENDANTS SMELLED SMOKE. WHEN THEY OPENED 26AB OVERHEAD BIN THEY SAW FLAMES COMING FROM PASSENGER BAG. FIRE WAS EXTINGUISHED BY FLIGHT ATTENDANTS. EMERGENCY DECLARED FLIGHT RETURNED ORD LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. NO DAMAGED NOTED TO OVERHEAD BIN. REPLACED THREE HALON FIRE EXTINGUISHERS. SYSTEM GROUND CHECKED NORMAL OPERATION CLOSED.