Skyhawk 172/Cutlass 172
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 4
Situational Awareness; Confusion
Airspace Violation All Types; Deviation / Discrepancy - Procedural Landing Without Clearance; Ground Incursion Runway
General None Reported / Taken
Procedure; Human Factors
Airport Ops called me on the land line and asked me if I had spoken to an Aircraft X. I did not recall speaking to an aircraft with that callsign; but I told him I'd check the tapes to verify. He informed me that he found the aircraft on the north ramp and believed that he had landed and taxied without any ATC authorization. According to airport ops there were 3 souls on the aircraft; 2 of which were deaf and mute and the third had no identification and he claimed that he was given ATC authorization to land.Upon further investigation we established that the aircraft entered the Class Delta airspace and landed without ever speaking to ATC. I did not see the aircraft since it was dark and he landed on the east runway which can be difficult to see aircraft during the day when you're looking for them.There's a lot you could do in this situation I think it was just a fluke occurrence.
EUG Tower Controller reported that he was questioned by Airport Operations if he had spoken to a particular aircraft. The Controller did not recall talking to the aircraft. Aircraft was found to be at the north ramp. Pilot stated he had ATC clearance to land. It was found out later that the pilot never talked to ATC.