As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING LINE INSPECTION, THE INTERIOR CEILING MOUNTED EMERGENCY ESCAPE SYSTEM (EES) LIGHTS AT THE 1L & 1R DOORS AS WELL AS THE COCKPIT OVERHEAD EES LIGHT WERE NOTED TO BE INOPERATIVE. THE BATTERY PACK WAS REPLACED IAW AMM 33-53 AND OPERATION CHECKED NORMALLY.