Small Aircraft; Low Wing; 1 Eng; Fixed Gear
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Commercial; Flight Crew Flight Instructor
Flight Crew Last 90 Days 200; Flight Crew Total 2029; Flight Crew Type 1550
Situational Awareness; Confusion; Distraction
Deviation / Discrepancy - Procedural Clearance; Ground Incursion Runway
Air Traffic Control Issued New Clearance; Flight Crew Became Reoriented; Flight Crew Took Evasive Action
Chart Or Publication; Airport; Environment - Non Weather Related
I was at AZO with a student and was parked at an FBO on the west side of Charlie Taxiway. We were cleared to taxi to Runway 9 via Charlie. We taxied over and crossed the hold short line for Runway 5 thinking there was another hold short line for 9; but there wasn't. I stopped the plane realizing that we were past the line. At the same time the Ground Controller advised that we missed the hold short line and told us to turn onto Runway 5 and stop there to do our run-up and advise them when we were complete (Runway 5 was not in use). We did so and took off on Runway 9. I knew the intersection of the two runways was a hot spot; but now I know why. There is such a gap from the hold short line for 5 (and 9) that you think there is another one for Runway 9 itself; but there isn't. The hold short line also isn't right next to the runway itself as there is a taxiway leading to Runway 9. Now that I have had this experience at this airport I will know what to do next time. This was a great lesson for the student and me alike as it really made us more aware of why hot spots exist and the importance of asking when in doubt.
An Instructor and Student crossed the AZO Runway 9 hold short line on Taxiway Charlie because the line was so far from the runway it was not recognized as the hold short line.