PC-12
Air Traffic Control Fully Certified
Communication Breakdown; Confusion; Situational Awareness
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance; Ground Incursion Runway
Air Traffic Control Issued New Clearance
Human Factors
Working Local Control I cleared Aircraft X to land and the pilot asked for a long roll out. I approved the long roll out but after the aircraft landed they were taxiing at a slow rate and I had departures to get out so I canceled the long roll out and told the aircraft to turn right on Bravo; hold short Runway 19 and remain my frequency. The aircraft read back 'turn right on Bravo'. I missed the read back of hold short Runway 19. I cleared Aircraft Y for takeoff on Runway 19. During the takeoff roll Aircraft X crossed Runway 19 hold short line on Bravo. As Aircraft X crossed the line they asked if I wanted them to continue and I told them to stop. At that time Aircraft Y was at rotation speed and became airborne around Taxiway Golf. Aircraft X stopped with most of the plane across the runway hold short line before the white runway edge line. Aircraft Y crossed Taxiway Bravo at approximately 20 FT. I then taxied Aircraft X to parking. Recommendation; listen closer to read backs and for pilots not to cross or taxi on runways unless told to do so.
After being cleared to land on by the Tower; I advised the Tower where I was parking the plane and cleared by the Tower to land long. After touchdown and during roll out Tower advised to exit on Taxiway C and contact Ground. Half ways through roll out Tower advised full length unavailable at the exit on B and remain with him. I exited runway on B and asked the Tower if it was ok to turn left at which point I was instructed to stop. Which I did. I looked to my right as an aircraft had just departed Runway 19. Miss distance is estimated at 100 FT vertically. At no time was a hold short instruction given. The Tower Controller was very busy working multiple aircraft of various types from airline to tailwheel. I feel that the Tower Controller had forgotten about me as his workload was great. You could hear in his voice and by how fast he was talking that he was stressed. I feel that if I had not asked for instruction there the outcome might have gone from an incursion to an accident.
Tower Controller described a loss of runway separation event when changing a 'land long' approval to an 'exit the runway' clearance with a hold short clearance; the hold short instruction confused by all involved.