As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE SERVICE CHECK THE FWD OVERWING EMERGENCY EXIT UPPER DOOR LIGHTS ON BOTH LT & RT SIDE WERE FOUND NOT ILLUMINATED. MAINTENANCE REPLACED THE B5-121 BATTERY PACK PER B717 AMM 33-51. OPERATIONAL CHECK WAS GOOD. OK FOR SERVICE. (LP #6930904)