As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING RON, PBI MAINTENANCE REPORTED THE RIGHT INTERIOR OVERWING EMERGENCY EXIT SIGN WOULD NOT ILLUMINATE. AFTER WORKING ON SYSTEM FOR AN HOUR, MAINTENANCE REPORTS THE BATTERY PACK STARTED WORKING. SUSPECT BATTERY PACK NEEDED CHARGED. RECHARGED BATTERY PACKS. OPERATIONAL CHECK GOOD.