What was found
THE TOMC CONTROLLER AND SENIOR MANAGER CONCUR THAT THE AIRCRAFT CAN BE RELEASED BACK TO SERVICE AFTER EXPERIENCING A DIVERSION O R AIR TURN BACK DUE TO A MECHANICAL REASON LOCKED BY SYSTEM. TOMC CONCURRED WITH SHIFT MANAGER WITH CORRECTIVE ACTION WITH REPLACEMENT OF BOTH SFCCS. UPON ARRIVAL, NO FLAP SYST 1 FAULT. CREW COULD NOT ENGAGE FLIGHT DIRECTORS 1 OR 2, RED "SPD LIMIT" FAULTS ON BOTH CAPT & F/O''SEADI. POST FLIGHT REPORT FAULTED SFCC 1, AFS TEST FAULTED SAME. RESET SFCC 1 & FCDC 1= FAULTS CLEARED. AFS & SFCC 1 TEST PASSED,SWAPPED SFCC TO #2 POSITION, NO FAULT,OPA TEST GOOD. DUE TO GATE RETURN, REPLACED SFCC 1 I.A.W. AMM 27-51-34, OPS TEST NORMAL.T/S PER TSM 27-51-00-810-845-A.