Small Aircraft; Low Wing; 1 Eng; Fixed Gear
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 2
Situational Awareness; Distraction
ATC Issue All Types; Conflict Ground Conflict; Critical; Deviation / Discrepancy - Procedural Other / Unknown
Air Traffic Control Issued New Clearance; Flight Crew Requested ATC Assistance / Clarification
Staffing; Procedure; Human Factors
I was working Local Control with our 2 parallel runways combined onto one frequency. There were 3 touch and goes; 2 on Runway XXR; and 1 on Runway XXL. There were 2 other aircraft inbound. I cleared Aircraft X to land runway XXR; sequencing them to follow Aircraft Y on a close in base. Aircraft Z called ready to go at Runway XXR to enter the traffic pattern. At the time; Aircraft Y was rolling out on the runway; so I told Aircraft Z to stand by. Once Aircraft Y became airborne; I cleared Aircraft Z for takeoff to follow Aircraft Y into the right-hand traffic pattern. I forgot about Aircraft X.Airport Ops called on frequency to inform me that he was at the localizer site on foot; and out of the Runway Safety Area. I glanced over to visually see Ops; who was past the departure end of Runway XXR. As Aircraft Z was crossing the threshold onto Runway XXR; Aircraft X was crossing over the top; intending to touch down onto the runway at the displaced threshold. Aircraft Z questioned why an aircraft was landing on the runway; which alerted me to the situation. I extended Aircraft Y downwind so they would not begin a base. I visually watched Aircraft X exit the runway; while Aircraft Z informed me he would wait for another takeoff clearance. Once Aircraft X was turned off the runway; I re-cleared Aircraft Z; and cleared Aircraft Y. I recommend the Tower controller should pay absolute attention to his active runways; and allow his pad to assist him in not forgetting about aircraft.
A Tower local Controller reported they cleared an aircraft for takeoff with an arriving aircraft crossing over the landing threshold.