Narrative:

We received taxi clearance from the ramp area for takeoff on runway 4R. We were cleared to taxi via taxiway B to taxiway 4R. Neither crew member was familiar with that portion of the airfield; so we requested further instructions while leaving the ramp area. We were instructed to proceed to the second taxiway intersection which was taxiway B and turn right; then left at the next taxiway; which was C. We knew that we were now headed towards runway 4L (half of runway 4L is closed and it is designated as taxiway a) threshold. We asked for instructions again; assuming that we would be told to turn right and taxi down the closed portion of runway 4L (taxiway a). Instead we were told we had crossed over the hold short line to runway 4L. We were stopped. Up to this time; we were never instructed to hold short of any runway or taxiway. We looked back and could see faded hold short lines - they were worn and not as highly visible as we are used to. We stopped short of the runway where it turns into taxiway a. There were no runway holding position signs at that point. There were no aircraft in the pattern for runway 4L and we were told to turn right on runway 4L/taxiway a and taxi to runway 4R. The takeoff and the rest of the flight was uneventful. Both crew members; prior to taxi; reviewed the airport diagram. There was no extension of taxiway B depicted that would allow us to avoid traveling runway 4L to get to taxiway a (closed portion of runway 4L). The airports guide likewise does not depict this. After landing we checked the airport diagram and it does depict the extension past taxiway C. This incident could have been avoided in several ways: 1) ground control could have told us to hold short at runway 4L; but didn't; so we assumed we were cleared on to taxiway a. 2) taxi instructions could have been more specific after we asked for further instructions upon leaving the ramp area - it was clear we were not familiar with the airport 'cross charlie to alpha.'3) hold short line could have been more visible. 4) there should have been a runway holding position sign. Commercial chart manufacturers need to update their diagrams to match NOAA's. 6) the controller could have told us to stop prior to passing the hold short line - he didn't say anything until we called asking for further instructions. 7) we could have been more vigilant and asked for instructions prior to the hold short line if we had seen it.

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Original NASA ASRS Text

Title: CE550 flight crew reports runway incursion at JRF due to a misunderstood taxi clearance and the Commercial Chart airport diagram that does not depict the new extension of Taxiway B leading to Taxiway A southwest of Runway 11/29.

Narrative: We received taxi clearance from the ramp area for takeoff on Runway 4R. We were cleared to taxi via Taxiway B to Taxiway 4R. Neither crew member was familiar with that portion of the airfield; so we requested further instructions while leaving the ramp area. We were instructed to proceed to the second taxiway intersection which was Taxiway B and turn right; then left at the next taxiway; which was C. We knew that we were now headed towards Runway 4L (half of Runway 4L is closed and it is designated as Taxiway A) threshold. We asked for instructions again; assuming that we would be told to turn right and taxi down the closed portion of Runway 4L (Taxiway A). Instead we were told we had crossed over the hold short line to Runway 4L. We were stopped. Up to this time; we were never instructed to hold short of any runway or taxiway. We looked back and could see faded hold short lines - they were worn and not as highly visible as we are used to. We stopped short of the runway where it turns into Taxiway A. There were no runway holding position signs at that point. There were no aircraft in the pattern for Runway 4L and we were told to turn right on Runway 4L/Taxiway A and taxi to Runway 4R. The takeoff and the rest of the flight was uneventful. Both crew members; prior to taxi; reviewed the airport diagram. There was no extension of Taxiway B depicted that would allow us to avoid traveling Runway 4L to get to Taxiway A (closed portion of Runway 4L). The airports guide likewise does not depict this. After landing we checked the airport diagram and it does depict the extension past Taxiway C. This incident could have been avoided in several ways: 1) Ground control could have told us to hold short at Runway 4L; but didn't; so we assumed we were cleared on to Taxiway A. 2) Taxi instructions could have been more specific after we asked for further instructions upon leaving the ramp area - it was clear we were not familiar with the airport 'cross Charlie to Alpha.'3) Hold short line could have been more visible. 4) There should have been a runway holding position sign. Commercial chart manufacturers need to update their diagrams to match NOAA's. 6) The Controller could have told us to stop prior to passing the hold short line - he didn't say anything until we called asking for further instructions. 7) We could have been more vigilant and asked for instructions prior to the hold short line if we had seen it.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.