What was found
AUTOTHROTTLE WILL NOT ENGAGE ON TAXI OUT. SWITCH DOES NOT HOLD IN "ARM" POSITION. ALL INDICATIONS NORMAL. A/T INFLIGHT FAULTS SHOWED 21 OCCURRANCES OF MAINT. MESSAGE 22 31502 FOR ASM 2 ON LEG 4. PERFORMED A/T BITE CURRENT STATUS TEST SEVERAL TIMES REF MM 22 31 00 ALL TESTS PASSED. ALSO PERFORMED A/T SERVO MOTOR TEST MULTIPLE TIMES REF MM 22 31 00. AFTER FAILING THE FIRST TEST FOR ASM 2 CYCLED AUTOTROTTLE DC1 C/B. ALL SUBSEQUENT SERVO MOTOR TESTS PASSED. OPS NORMAL.