As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHT ON OVERHEAD DROP PANEL ABOVE AFT JUMP SEAT, BLINKING DURING TAXI AND AFT CABIN DOOR EXIT SIGN INOPERATIVE. TROUBLESHOT AND FOUND BATTERY PACK B5-237 LOOSE AND BATTERY DRAINED. R & R BATTERY IAW AMM. OPERATION CHECKED NORMAL.