What was found
DURING CRUISE, AUTOTHROTTLE LIM BOX APPEARED AS N1 LIMIT ANNUNCIATION ON UPPER DU. SYSTEM HANDBOOK STATES: WHEN DISPLAYED INDICATES THE FMC IS NOT PROVIDING THE AUTOTHROTTLE SYSTEM WITH N1 LIMIT VALUES. THE AUTOTHROTTLE IS USING A DEGRADED N1 THRUST LIMIT FROM THE RELATED EEC. ACFT GROUNDED. FMC BITE FOR AUTOTHROTTLE SHOWS 12 FAULTS LAST FLIGHT. FAULTS 22-31413 & 22-31513. EEC INFO CH A & B. AUTOTHROTTLE BITE TESTED GOOD IAW TASK 22-31, TASK 801. ACCOMPLISHED FIM TASK 22-31, TASK 806 FOR FAULT CODES. NO FAULTS NOTED. SUSPECT INTERMITTENT FAULT.