What was found
ON TAKEOFF FROM SPIM, AIRCRAFT EXPERIENCE AUTO PILOT NR 2 WOULD NOT ENGAGE, WITH THE NR 1 AUTO PILOT ON DEFERRED MAINTENANCE. THE FLIGHT CREW ALSO REPORTED "ROLL SWS FAIL" DISPLAY. AIRCRAFT DUMPED FUEL AND RETURN TO SPIM WITHOUT FURTHER INCIDENT. REMOVED & REPLACED NR 1 FCC (ROLL SWS FAIL" DISPLAY) AND REMOVED & REPLACED NR 2 FCC (AUTOPILOT NR 2 WILL NOT ENGAGE0. OPERATIONAL CHECK IAW 22-01-03, AND RTS TEST PASSED IAW 22-00-00. AIRCRAFT RETURNED TO SERVICE.