Date: 202105
Local time of day: 1201-1800
Location: POU.Airport, NY
Aircraft: Small Aircraft; High Wing; 1 Eng; Fixed Gear
Operating under: Part 91
Flight phase: Taxi
ATC / advisory: Tower POU
Aircraft component: Engine
Component problem: Malfunctioning
Reporter organization: Government
Reporter function: Local
Human factors: Distraction; Situational Awareness; Troubleshooting
Second reporter function: Local
Anomaly: ATC Issue All Types; Aircraft Equipment Problem Less Severe
Detector: Person Air Traffic Control
When detected: Taxi
Result: General None Reported / Taken
Contributing factors: Aircraft; ATC Equipment / Nav Facility / Buildings; Airport
Primary problem: ATC Equipment / Nav Facility / Buildings

Narrative: Aircraft X was cleared for the option on Runway 24. After starting departure roll for a touch and go operation; Aircraft X reported an engine sputter; and chose to abort takeoff. I was training on the Local Control position at the time; and asked Aircraft X if he required any assistance. Aircraft X responded 'no' and was instructed to turn left onto Taxiway A at the end of the runway. Aircraft Y was on final for Runway 24 at this time; and using landmarks; it was determined that runway separation was ensured for all phases of Aircraft Y's touch and go operation. Aircraft X was observed in a turn and clear of the edge of runway. At that point Aircraft X taxied to a position where the aircraft was not observed due to a newly built hangar on the airport. Tower personnel did not observe Aircraft X taxi beyond the view that was obstructed in a timely manner; and were concerned for the pilot of Aircraft X.The recently built hangar west of the Control Tower presents a line of sight issue that diminishes the ability for the Control Tower to provide service to the users of POU in a safe; orderly; and expeditious manner. The hangar is too high for Tower personnel to have a full view of all movement areas on the field. The hangar should be lowered; or the Tower should be raised.


Second narrative: The blind spot caused by the construction of a new hanger has been an ongoing issue at POU. I was working CIC. Runway 24 was the active. Training was in progress on LC.  3 Routine touch and go aircraft were in the pattern.  Aircraft X was performing T and G with Aircraft Y well behind him in sequence.  As Aircraft X was on departure roll; the pilot aborted takeoff and rolled all the way to the end of the Runway 24.  He said he didn't require any assistance and was visually observed crossing the runway edge line and turning off Runway 24 onto alpha taxiway.  Simultaneously; Aircraft Y was observed over the approach end threshold; but we could not VISIBLY VERIFY if the pilot in Aircraft X still had forward progress when he went passed the runway edge lines at the end of Runway 24.  Being unable to see the aircraft moving (or not moving) passed the hold short on taxiway Alpha off of Runway 24; limits ATC ability to make informed decisions on having to send following aircraft around or safely land.  The new hanger blind spot has been creating unnecessary problems in the way ATC is conducted on BOTH Runway 6 and Runway 24.Recommendation - Build a new taller tower; add height to the existing tower; lower the hanger to eliminate the blind spot.


Synopsis: POU Tower Controllers reported not being able to see the aircraft of a student pilot after a rejected takeoff due to construction of a new hangar.  The student pilot also reported describing the rejected takeoff.