What was found
DURING CLIMBOUT FROM DTW, AUTO-PILOT DROPPED OFF LINE, CAPTAIN'S RMI FLAGGED, FORWARD AND AFT FUEL BOOST PUMP CIRCUIT BREAKERS POPPED. FLIGHT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. FOUND RIGHT AC BUS PHASE A CIRCUIT BREAKER BROKEN AND REPLACED THE CIRCUIT BREAKER. ALSO, RESET BOOST PUMP CIRCUIT BREAKERS. OPERATIONAL CHECK OK, AIRCRAFT RETURNED TO SERVICE.