As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING LINE CHECK, MAINTENANCE FOUND THAT THE EMERGENCY PATHWAY LIGHTING FOR ROWS 18 THROUGH 21 IN COACH SEATS HAD FAILED. AFTER MAINTENANCE FOUND THE EXIT IDENTIFIER POWER PACK FUSE BY THE AFT FLIGHT ATTENDANT PANEL HAD BLOWN THEY INVESTIGATED FURTHER. THE POWER SUPPLY WIRE WAS FOUND PINCHED BETWEEN THE SEAT RAIL AND THE SEAT TRACK AT ROW 18. THE WIRE WAS REPAIRED, THE FUSE REPLACED, AND OPERATIONAL CHECK COMPLETE.