What was found
AIRCRAFT NOT GROUNDED: PILOT REPORTS AUTOTHRUST COMMANDED HIGH THRUST 2X, THEN IDLE A 3RD TIME WHEN MANAGED SPEED SELECTED AT FL320 FROM STABLE M)&^ SELECTED. & M076IN CRS & DES PAGES. DURING UNACCELERATED M076 LEVEL FLIGHT. AUTOPILOT #2 TURNED LEFT OFF COURSE AT F320 JUST PRIOR TO NWMAN ON LAX STAR HLWD1. RECOUPLED WHEN BACK ON COURSE, OKAY FOR DURATION. AUTOTHRUST TARGET AND MANAGED SPEED FAILED TO ADJUST (MAGENTA ARROW STILL AT 124 KIAS AFTER 130 KIAS. ENTERED IN APPROACH PAGE. MAINTENANCE ACCOMPLISHED ILS LAND TEST AND RESET FMGC COMPUTERS, ALL CHECKS NORMAL IAW AMM 22-96-00. AND AFS GROUND TEST NORMAL IAW AMM 22-91-00.