As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT REPORTED THE EMERGENCY EXIT LIGHT OVER THE CABIN DOOR AS BEING INOPERATIVE. MAINTENANCE TROUBLESHOT SYSTEM AND REMOVED AND REPLACED THE BATTERY POWER SUPPLY AT POSITION NR 100. OPERATIONAL CHECKS WERE GOOD. AIRCRAFT RETURNED TO SERVICE.