What was found
AUTOTHROTTLES WILL NOT ENGAGE IN FLIGHT. ACFT GROUNDED. AUTOTHROTTLE BITE CHECKED IAW FIM 22-31 TASK 801 SHOWED FAULT 22-31687 ASM-1 LOGGED TWICE FOR LEG 9. PERFORMED TROUBLESHOOTING FOR FAULT 22-31687 IAW FIM 22-32 TASK 819 - AUTOTHROTTLE SERVO MOTOR TEST PASSED WITH NO FAULTS. FAULT IS DEFINED AS NUISANCE FAULT IAW FIM AT THIS TIME. PERFORMED AUTOTHROTTLE OPERATIONAL TEST IAW AMM 22-31-00-710-801 - ALL TESTS PASS. AIRCRAFT IS QUALIFIED FOR CAT IIIA AUTOLAND AND HGS OPS AND STATUS PLACARD REFLECTS SAME.