As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIT-FLIGHT 3555 CREW REPORTED EMERGENCY LIGHTS FLICKER IN FLIGHT. MAINTENANCE SWAPPED AC CONTACTOR BOXES WITH ANOTHER AIRCRAFT FOR TROUBLESHOOTING. CLEANED ALL CANNON PLUGS ON BOXES, REPLACED RIGHT TRANSFORMER RECTIFIER UNIT CIRCUIT BREAKER AND REPLACED PROPELLER HEAT RELAY 3061-K2. OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE.