As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AFT EMERGENCY EXIT SIGN, CAPTAINS SIDE, IS INOPERATIVE. MAINTENANCE FOUND THAT ALL OF THE ASSOCIATED LIGHTS WITH EMERGENCY POWER SUPPLY B5-260 WERE FLASHING IN THE ARMED POSITION. THE BATTERY AND BATTERY POWER SUPPLY WERE REPLACED PER AMM 33-51-03. ALL OPERATIONS ARE NOW NORMAL.