A321
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Distraction
Aircraft Equipment Problem Critical
Flight Crew Overcame Equipment Problem
Aircraft; MEL; Procedure
Dispatched with MEL ELAC [Elevator Aileron Computer] 1 fault...below 1;000 feet; FO disconnected autopilot and at 500 feet FO stated his control stick was not responding to his inputs.  I immediately took control of the aircraft and completed a normal landing since my controls were working fine and I deemed it safer than going around with a possible flight control/control stick anomaly. No associated ECAMs came on.Suggestions: Don't allow Dispatch with an ELAC fault as allowed per MEL if it turns out this was related to MEL.
Reporter stated being unable to determine if the side stick failure was positively related to the ELAC 1 MEL; but feels it's a possibility.  Reporter stated being particularly concerned that there were no ECAM alerts associated with the FO's control stick failure.
A321 Captain reported being dispatched with ELAC 1 (Elevator Aileron Computer) fault; and on final approach at 500 feet AGL the FO reported his control stick was not responding to his inputs. Captain took control and landed normally.