As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY FLOOR LIGHTING FROM ROWS 14 TO 24 INOP. TROUBLESHOOTING REVEALED FAILED LIGHTING POWERPACK. INSPECTION REVEALED A BLOWN FUSE IN THE POWERPACK BATTERY CHARGER. FUSE WAS REPLACED, BATTERY PACK ASSEMBLY REPLACED, OPS CHECK GOOD AS PER M/M 33-51-07. AIRCRAFT WAS RETURNED TO REVENUE SERVICE.