As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A MAINTENANCE WALK AROUND CHECK, THE MID CABIN OVERHEAD EMERGENCY EXIT LIGHT WOULD NOT ILLUMINATE. MAINTENANCE REMOVED AND REPLACED THE BATTERY CARTRIDGE IAW BOEING MM 33-51-31. THE MID CABIN OVERHEAD EMERGENCY EXIT LIGHT NOW OPERATED NORMALLY. (M)