As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - FLIGHT 2207 FLIGHT ATTENDANT ADVISES THAT THE EXIT LIGHT ABOVE THE DOOR FLICKERS ON AND OFF ACCOMPANIED BY A POPPING SOUND. MAINTENANCE REPLACED RELAY 3351-K2 (FOUND BROKEN WIRE ON K-2 RELAY). REPLACED EMERGENCY BATTERIES. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.