What was found
AUTOTHROTTLE SWITCH WILL NOT STAY ENGAGED. ACFT GROUNDED. CONFIRMED FAULT, A/T ASM-2, FAILS SERVO MOTOR TEST MSG 22-31795, ASM-2 10 DEG RATE FAULT. A/T FLIGHT FAULT REVIEW ALSO SHOW MSG 22-31688, ASM-2 FAULTS. R & R NR 2 A/T SERVO MOTOR REF AMM, TASK 22-31-91, GROUND FUNCTIONAL CHECK NORMAL. ACCOMPLISHED DFCS LRU REPLACEMENT TEST REF FIM 22-11, TASK 802, A/T TEST REF AMM 22-31-00/501, HGS SENSOR/SYS TEST REF SMM 34-36-00 AND DFCS LAND VERIFY TEST, GP 49, REF AMM 22-11-00/201, OPS CHECK NORMAL.