Small Transport
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Flight Crew Last 90 Days 100; Flight Crew Total 4000; Flight Crew Type 400
Confusion
Conflict Ground Conflict; Less Severe; Deviation / Discrepancy - Procedural Landing Without Clearance
Air Traffic Control Separated Traffic; Flight Crew Took Evasive Action
Aircraft; Human Factors; Procedure
Holding short of Runway 15 at INT on Taxiway F cleared for back taxi for Runway 33 departure; after aligning on runway for back taxi Aircraft Y appeared over hump in runway on landing roll out followed by Tower Controller asking where he came from and stating he was not cleared for landing. We held position and the other aircraft came to a stop. Tower asked if we could taxi past each other on the runway. We could. Aircraft Y taxied clear and we continued our back taxi and departure.
After being given clearance to back taxi Runway 15 for a Runway 33 departure at INT we started to turn on runway; after lining up for back taxi Aircraft Y appeared over the crown on the runway apparently in a landing roll out; just after we saw the aircraft Tower asked where he came from and stated he did not have clearance to land. Apparently the other crew had become task saturated and didn't realize they hadn't communicated with INT Tower. We held position upon seeing the plane and hearing tower. They were able to taxi past us and go to parking and we continued our back taxi and departure without further incident.
Pilot at INT was issued back taxi instructions when taxiing an opposite direction arrival appears on the runway. Tower Controller never issued a landing clearance or knew abut the landing aircraft.