What was found
AUTO THROTTLE WILL NOT REMAIN ENGAGED DISCONNECTS WHEN RE-ENGAGED. NOTED NR 1 THRUST LEVER MOVES, NR 2 LEVER DOES NOT. THEN DISCONNECT OCCURRED. GROUNDED - YES. PERFORMED AUTOTHROTTLE BITE REF FIM 22-31 TASK 801. FOUND FAULT 22-31688 ASM 2 FAULT ON LEG 8. NO OTHER FAULTS FOUND. PERFORMED AUTOTHROTTLE TESTS PER FIM 22-32 TASK 819. INITIAL EVALUATION. "NUISANCE FAULT" PER ABOVE REF FIM. OPS GOOD NO FAULTS. ETOPS SIGNIFICANT SYSTEM GROUND VERIFICATION SUCCESSFUL. AIRCRAFT RELEASED FROM MEL 22-4B AND MEL 22-99B.