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 RT SIDE OVER-WING EMERGENCY EXIT LIGHT WOULD NOT ILLUMINATE. MAINTENANCE REMOVED AND REPLACED THE POWER SUPPLY AND BATTERY PACK FOR THE RT HAND OVER-WING EMERGENCY EXIT LIGHT IAW MFG MM. EMERGENCY EXIT LIGHTS NOW OPERATE NORMALLY.