As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A SERVICE CHECK, FOUND THE VENTRAL DOOR EXIT SIGN AND SOME CEILING LIGHTS INOPERATIVE, DURING AN EMERGENCY LIGHT TEST. TROUBLESHOT AND FOUND THE BATTERY PACK B5-237 TO BE FAILED. REMOVED AND REPLACED THE BATTERY PACK IAW AMM 33-51-03 AND WDM 33-51-12. OPS CHECKED GOOD.