What was found
WHILE PERFORMING THE AILERON HARDOVER PREVENTION SYSTEM OPERATIONAL CHECK (HOPS), LEFT AILERON HYDRAULIC S/O (PILOT-C4) CIRCUIT BREAKER WOULD POP AND HYDRAULIC PRESSURE WAS NOT REMOVED FROM THE AILERON ACTUATOR. SHUTOFF VALVE WAS FOUND ELECTRICALLY SHORTED. R & R VALVE, PERFORMED LEAK CHECKS AND OPS CHECKS. THIS WAS A DORMANT FAILURE THAT WOULD NOT HAVE ALLOWED THE "HOPS SYSTEM" TO SHUTOFF HYDRAULIC PRESSURE TO THE LEFT AILERON IF IT WOULD HAVE HAD A FAULT IN FLIGHT. CB DIDN`T POP UNITL OPERATIONAL CKS OF THE "HOPS SYSTEM" FORCED THE VALVE TO ACTIVATE.