Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Conflict Airborne Conflict
General None Reported / Taken
Airspace Structure; Environment - Non Weather Related; Procedure; Human Factors
Passenger came to the flight deck after we landed. Said he worked for the FAA and said that he saw a drone pass on the right side of the aircraft.  Said it was about 3 feet wide and a quadcopter. From the description from the passenger of where we were when he saw it I am guessing that it was before the approach. I am guessing we were between 5000-3000 feet. I informed the flight duty officer and base manager who were going to tell act.None
A321 Captain reported a passenger informed the flight crew of a airborne conflict with a UAV during the arrival phase of the flight.