What was found
PRI STAB TRIM FAIL CAS MESSAGES IN FLT AT FL380, PRI STAB TRIM FAIL, A/P FAIL AND MACH TRIM OFF. CHECKED SYSTEM FOR PROPER OPERATION. COULD NOT DUPLICATE SQUAWK. REMOVED LT & RT HORIZONTAL STAB ACTUATOR ACCESS PANELS. FOUND WATER ON ALL CONNECTORS. CLEANED ALL CONNECTORS. CHECKED POWER AND GROUND; BRAKE AND CLUTCH CIRCUITS, ALL CHECKED GOOD. APPLIED DC4 TO ALL CONNECTORS AND RECONNECTED. OPS CHECKED GOOD, IAW 750 M/M CH 27-40-00. CLOSED UP REMOVED PANELS.