What was found
DURING APPROACH, AT APPROX 2300 FEET, ACFT WENT TO TOGA-GIA MODE AT MANNED SPEED SELECTION. ABORTED APPROACH. DURING GO AROUND MADE SEVERAL ATTEMPTS DISCONNECT TOGA FROM AUTO THRUST SYS, EACH TIME POWER WENT BACK TO TOGA. AUTOPILOT 1 DISCONNECTED SEVERAL TIMES DURING EVENT. ACCOMPLISHED OPERATIONAL TEST OF THE AUTO THRUST SYS ISOLATION, WITH AIBS, IAW AMM 22-30-00 & LAND CAT III CAPABILITY TEST IAW AMM 22-97-00 WITH NO FAULTS FOUND. SYS CHECKED NORMAL.