As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND EMERGENCY LIGHTS INOPERATIVE, TWO IN THE CABIN & TWO EXTERNAL EMERENCY LIGHTS. TROUBLESHOT IAW WDM 33-52-00 AND 33-51-00 AND FOUND BATTERY PACK NR 4 TO BE BAD. REMOVED AND REPLACED THE BATTERY PACK IAW AMM 33-51-04-000-801, AND AMM 33-51-04-400-801. SELF TEST OF BATTERY PACK AND CHARGER ASSEMBLY TESTED GOOD IAW AMM 33-51-04-740-005. ALL LIGHTS WORKING.