As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING A SERVICE CHECK, MX DISCOVERED THAT THE RT OVERWING EMERGENCY EXIT LIGHT WOULD NOT ILLUMINATE. (BULBS WERE GOOD) MX R & R THE RT OVERWING EMERGENCY EXIT LIGHT EMERGENCY BATTERY PACK IAW MM 33-50-0. THE SYS OPERATIONALLY CHECKED GOOD AND THE ACFT WAS RETURNED TO SERVICE.