What was found
YAW DAMPER AND AUTOPILOT FAILED ON BOTH SIDES DURING CRUISE. FLT CONTINUED WITH NO PROBLEMS. BOTH FGC’S WERE FOUND TO BE U/S. 2 NEW FGC’S AND A KNOWN SERVICEABLE SERVO WERE INSTALLED RESULTING IN 2 MORE U/S FGC’S UPON FURTHER INVESTIGATION, FOUND A FAULT WITH CLUTCH POS CIRCUIT. PULLED CONNECTOR AT PRESS DOME AND FOUND PIN F AT 2210-P2 GROUNDED, THEN WENT TO 2210-P1 WHEN THAT CONNECTOR WAS PULLED PIN F WAS NOW OPEN BUT SHORTED TO PIN N. COMPLETED A FULL INSPECTION BETWEEN BOTH CONNECTORS AND FOUND NO VISUAL FAULTS. STARTED AT FRONT MOVING WIRE BUNDLES AND FOUND FACTORY SPLICE FOR SHIELDING ON PIN N HAD CHAFFED INTO WIRE ON PIN F WIRE NUMBER 2210-5K20-2. WHEN FUNCTION TESTING THE A/P WHEN THERE IS A SNAG,