As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED. EMERGENCY ESCAPE CEILING LIGHTS FROM FUSELAGE STATION 1130 TO 1300 ARE INOPERATIVE. REMOVED AND REPLACED BATTERY PACK B5-27 AND BATTERY ASSEMBLY B5-107 (AALA20170910009) PER AMM 33-53-00. OPERATIONAL CHECK GOOD.