What was found
ON LANDING, ONCE AUTOBRAKES ENGAGED, A/C HAD VIOLENT SHAKE, DISENGAGED AUTOBRAKES AND GOT UNSAFE CENTER GEAR. MAINTENANCE CONFIRMED HYD LEAK. TOWED TO GATE. NORMAL LANDING. REMOVED AND REPLACED THE CENTER LANDING GEAR, DRAGBRACES, TIRES,BRAKE, ANTI SKID MANIFOLDS AND OTHER RELATED PARTS PER FEDEX WORK CARDS 32T1004,3 2T1904 AND 32T4904. REMOVED AND REPLACED DAMAGED HYDRAUILC LINE ON WRI 32-12/0898 AND 32-44/0897. PERFORMED GEAR SWING PER FEDEX WORK CARD 32T3601. ALL GEAR OPS CHECK AND LEAK CHECKS GOOD.