What was found
DURING TRO WITH MAX BRAKES SELECTED, ONLY WHEEL BRAKES ON NR1,2,5,6 (LT SIDE) OPERATED NORMALLY. ACFT STARTED ABRUPT PULL TO LT DESELECTED AUTO BRAKES AND STOPPED USING MANUAL BRAKES. MEL 20NOV09 14:24 GRR RELEASED FOR SERVICE IAW MEL: 32-42-05 CATEGORY: C, EXPIRATION: 30NOV09 "MEL 32-42-05: AUTOBRAKE SYS - INOP. COMPLETED BITE TEST OF BRAKE SYS CONTROLLER AND ANTI SKID NO FAULTS LOGGED ALL TESTS PASS IN REF TO TSM32-42-00. UNABLE TO PERFORM HIGH SPEED TAXI TO DUPLICATE PROBLEM. NO HISTORY FOR 99 DAYS.