What was found
DURING TAKEOFF ROLL, AUTOTHROTTLE DID NOT SET THE CORRECT N1 PRESCRIBED BY THE FMC. FMC PRESCRIBED N1 OF 94.8%,AUTOTHROTTLE ACTUALLY SET 90%. POWER HAD TO BE MANUALLY INCREASED. ACFT GROUNDED. A/T LOGGED T/O SET LOW MSG 22-31678, 22-21677, 22-31676, AND 22-31675. PERFORMED A/T SYSTEM BITE PROCEDURES IAW FIM 22-31 TASK 801 AND ALL OPS CHECKED GOOD. NO CURRENT FAULT. DFCS LRU REPLACMENT TEST FOR A/T OPS CHECKED GOOD, IAW FIM 22-11 TASK 802. HGS SENSOR TEST FOR FCC A/T OPS CHECKED NORMAL, IAW AMM 34-36-00. LWMP STATUS PLACARD SCREW CHECKED AND REMAINS UPGRADED TO CATIIIA AUTOLAND AND HGS.