What was found
AUTOBRAKES DISCONNECTED ABRUPTLY AND HARSHLY AT 60 KNOTS ( AFTER BRAKES WERE ALREADY APPLIED ). ON TAXI IN, NOTICED AUTOBRAKES STILL SET TO MEDIUM TURNED OFF AUTOBRAKES MANUALLY WITH PUSH BUTTON. PERFORMED BITE TEST OF THE BSCU IAW AMM 32-46-00, NO FAULTS NOTED. SYSTEM OK FOR SVC. (LP: 9498492, AIRCRAFT WAS GROUNDED)