What was found
AFTER DEPARTURE FROM FSD, THE AIRCRAFT EXPERIENCED A DC ELECTRICAL SYSTEM FAILURE. CREW SELECTED EMERGENCY POWER AND RETURNED TO FSD, NO EMERGENCY WAS DECLARED. TROUBLESHOT DC POWER SYSTEM, FOUND REVERSE CURRENT RELAY CIRCUIT BREAKER TRIPPED. RESET CIRCUIT BREAKER. OPS CHECKED GOOD, AIRCRAFT WAS RETURNED TO SERVICE. (M)