As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PRE-FLIGHT CREW FOUND THE EMERGENCY LIGHT AT 4A TO BE INOPERATIVE. MAINTENANCE REPLACED THE DOME LIGHT AT 4A AND AN EMERGENCY POWER SUPPLY IAW MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (SW21200501824) (K)