As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PRE-FLIGHT, THE RIGHT EMERGENCY EXIT CONTROL CIRCUIT BREAKER TRIPPED AND WOULD NOT RESET. FUEL VALVE 'CLOSED', LAMPS WENT DIM THEN BRIGHT WHEN CIRCUIT BREAKER TRIPPED AGAIN. FOUND WIRE SPLICE IN AFT AIRSTAIRS COMPARTMENT CHAFED AROUND AN ADEL CLAMP. WIRE REPAIRED.