What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) A lampholder on the cabin lower sidewall light started arching and ignited the bin close out material above seat row 3EF and 4EF. This light socket is manufactured by luminator part #020042-XXX, 0200956-XXX, and 0201260-XXX. The bin close out material, Douglas nomenclature="dust seal/barrier", c&d aerospace part #1347-0362, was the fuel for the fire. Damage was limited to the lower side of the overhead bin above seat row 3EF and 4EF, 2 each psu panels, wiring harness attached to psu panels, insulation around air duct, and florescent light socket.
As the FAA filed it
(-23) A LAMPHOLDER ON THE CABIN LOWER SIDEWALL LIGHT STARTED ARCHING AND IGNITED THE BIN CLOSE OUT MATERIAL ABOVE SEAT ROW 3EF AND 4EF. THIS LIGHT SOCKET IS MANUFACTURED BY LUMINATOR PART #020042-XXX, 0200956-XXX, AND 0201260-XXX. THE BIN CLOSE OUT MATERIAL, DOUGLAS NOMENCLATURE="DUST SEAL/BARRIER", C&D AEROSPACE PART #1347-0362, WAS THE FUEL FOR THE FIRE. DAMAGE WAS LIMITED TO THE LOWER SIDE OF THE OVERHEAD BIN ABOVE SEAT ROW 3EF AND 4EF, 2 EACH PSU PANELS, WIRING HARNESS ATTACHED TO PSU PANELS, INSULATION AROUND AIR DUCT, AND FLORESCENT LIGHT SOCKET.