What was found
FLT 461, AFTER LANDING ROLL OUT, AIRCRAFT SHOOK VERY HARD UNTIL AIRCRAFT REACHED 5 TO 10 KTS, UNABLE TO TELL IF IT WAS NOSE OR MAIN WHEEL SHIMMY, AIRCRAFT TAIL SWAP WITH 802. INSPECTED NLG FOUND BOTH STEERING ACTUATORS HAD PLAY. REMOVED AND REPLACED BOTH STEERING ACTUATORS. OPS CHECK NORMAL.