AN A319 FO RPTS A JAMMED RUDDER ON LNDG THAT MAY HAVE BEEN CAUSED BY THE CAPT'S FEET ON THE RUDDER PEDALS.

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I WAS THE FO AND THE PF. DURING THE LNDG FLARE WITH A SLIGHT XWIND THE RUDDER APPEARED TO HAVE BEEN JAMMED AS IT TOOK AN EXTREME AMOUNT OF FORCE TO MOVE THE RUDDER. I STATED TO THE CAPT THAT THE RUDDERS WERE JAMMED. HE REPLIED 'YEP.' HE TOOK THE ACFT FROM ME AND TAXIED OFF THE RWY AND TO THE GATE. DURING TAXI I ASKED IF HE WAS ON THE RUDDERS. HE REPLIED; 'NO; MY FEET WERE FLAT ON THE FLOOR.' DURING THE FLARE WHEN THE RUDDERS WERE STIFF I GLANCED OVER TO THE CAPT'S SIDE AND I COULD SEE HIS FEET WERE UP ON THE PEDALS. SINCE THE CAPT ACKNOWLEDGED A RUDDER JAM BUT CLAIMED HIS FEET WERE 'FLAT ON THE GND;' THIS ACFT SHOULD HAVE BEEN 'WRITTEN UP' WHEN WE REACHED THE GATE. I SHOULD HAVE INSISTED THAT THE ACFT BE WRITTEN UP TO ENSURE NO FUTURE PROBS WITH THE RUDDER DURING LNDG. IF THE CAPT WAS UNWILLING TO WRITE IT UP I SHOULD HAVE CALLED MAINT MYSELF. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT IN RETROSPECT HE IS SURE THE CAPT HAD HIS FEET ON THE RUDDERS LOCKING THEM.