What was found
EN ROUTE, NUMBER 1 TRANSFER BUSS CIRCUIT BREAKER TRIPPED. RESET BREAKER, BUT TRIPPED AGAIN. CABIN PRESSURE BEGAN TO CLIMB IN AUTO. AIRCRAFT DESCENDED TO 10,000, DIVERTED TO DAL AND MADE AN UNEVENTFUL LANDING. INSPECTED, REPLACED R3 RELAY AND PERFORMED BUSS TRANSFER CHECK.