What was found
AUTOPILOT NR 1 & 2, AUTO THROTTLES WOULD NOT ENGAGE. NO FLIGHT FAULTS LOGGED FOR THE FCC1 OR FCC2. CHECKING THE FCC1 & FCC2 PREVIOUS FAULTS. BOTH FCC SHOW LEG 1 NO FAULTS, OR FLY INTO IND. LEG 2 FAULTS WERE ELEV FAULT, WHICH EWR RESOLVED. THEN NEXT FAULT WAS LEG 16 WHICH WAS A NR 6 WHEEL SPEED XDUCER. NO REPEATING FAULTS. THE FCP WAS INSTALLED IN MARCH 2014 & APPEARS THAT THIS FCP MAY BE THE PROBLEM IAW FORMED THE LND TEST, RUDDER, ELEV, RUDDER & FCP TEST THRU THE FCC NR 1 & 2 WITH NO PROBLEMS. REPLACED THE FCP & TESTED IAW MM 22-00-4-5 TEST WAS NORMAL. PERFORMED THE AUTO FLIGHT TEST IAW MM 22-0 0-00-5-0 ON THE NR 1 & 2 FCC'S, TESTS WERE NORMAL WITH NO FAULTS. BOTH AUTOPILOTS & ATS OPERATED OK.