What was found
(CAN) DURING FLIGHT, CIRCUIT BREAKER FOR THE SPOILER SHUTOFF VALVES POPPED. AFTER LANDING, MAINTENANCE COULD NOT DUPLICATE THE SNAG. BOTH A AND B SYSTEMS WERE FUNCTION CHECKED SERVICEABLE. ON THE NEXT FLIGHT, THE CB POPPED AGAIN. THE AIRCRAFT WAS OPERATED ON A FERRY PERMIT TO RETURN FOR FURTHER MAINTENANCE. THE WIRE, W322-00 5-18 WAS FOUND SHORTED TO GROUND FROM CONNECTOR D758 TO CONNECTOR D4842P. THE WIRE WAS REPAIRED IAW STANDARD WIRING PRACTICES MANUAL.