Narrative:

The near runway incursion occurred during taxi to the active runway for takeoff. At the time I was acting as the PF and was actively taxiing the aircraft. The captain was setting up the flight plan in the FMS; was speaking with ground control and had the airport diagram attached to his yoke. Ground control cleared us to taxi to the active runway 19. I do not believe that they gave specific taxi instructions. Although the aircraft is based at this airport; runway 19 is an unusual runway for departure because the typical runway 27 was closed. The captain told me to taxi to runway 19 and pointed out the initial direction. We came to a 3-WAY intersection and I began to take the taxiway I thought was correct. The captain pointed out another taxiway and indicated that was the correct way. Ultimately this turned out to be incorrect; but I do not believe that is the ultimate cause of the near runway incursion. We came to a hold short line for runway 19 and I stopped the aircraft at the hold short line. We had a short discussion about where we were on the field. The captain thought that we were at runway 27 (although I learned this after the incident) and told me to taxi out on the runway to join taxiway B. I asked if he was sure that's where we were and he said yes. I had my doubts but took his instruction and began to move the aircraft. Ground control quickly told us to stop and we did only slightly beyond the hold short line. They told us that we were about to taxi onto an active runway; gave us a 180 degrees; progressive taxi instructions and a little bit of a tongue lashing (well deserved).

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Original NASA ASRS Text

Title: LEAR 35A FLT CREW HAS A RWY INCURSION AT ILG.

Narrative: THE NEAR RWY INCURSION OCCURRED DURING TAXI TO THE ACTIVE RWY FOR TKOF. AT THE TIME I WAS ACTING AS THE PF AND WAS ACTIVELY TAXIING THE ACFT. THE CAPT WAS SETTING UP THE FLT PLAN IN THE FMS; WAS SPEAKING WITH GND CTL AND HAD THE ARPT DIAGRAM ATTACHED TO HIS YOKE. GND CTL CLRED US TO TAXI TO THE ACTIVE RWY 19. I DO NOT BELIEVE THAT THEY GAVE SPECIFIC TAXI INSTRUCTIONS. ALTHOUGH THE ACFT IS BASED AT THIS ARPT; RWY 19 IS AN UNUSUAL RWY FOR DEP BECAUSE THE TYPICAL RWY 27 WAS CLOSED. THE CAPT TOLD ME TO TAXI TO RWY 19 AND POINTED OUT THE INITIAL DIRECTION. WE CAME TO A 3-WAY INTXN AND I BEGAN TO TAKE THE TXWY I THOUGHT WAS CORRECT. THE CAPT POINTED OUT ANOTHER TXWY AND INDICATED THAT WAS THE CORRECT WAY. ULTIMATELY THIS TURNED OUT TO BE INCORRECT; BUT I DO NOT BELIEVE THAT IS THE ULTIMATE CAUSE OF THE NEAR RWY INCURSION. WE CAME TO A HOLD SHORT LINE FOR RWY 19 AND I STOPPED THE ACFT AT THE HOLD SHORT LINE. WE HAD A SHORT DISCUSSION ABOUT WHERE WE WERE ON THE FIELD. THE CAPT THOUGHT THAT WE WERE AT RWY 27 (ALTHOUGH I LEARNED THIS AFTER THE INCIDENT) AND TOLD ME TO TAXI OUT ON THE RWY TO JOIN TXWY B. I ASKED IF HE WAS SURE THAT'S WHERE WE WERE AND HE SAID YES. I HAD MY DOUBTS BUT TOOK HIS INSTRUCTION AND BEGAN TO MOVE THE ACFT. GND CTL QUICKLY TOLD US TO STOP AND WE DID ONLY SLIGHTLY BEYOND THE HOLD SHORT LINE. THEY TOLD US THAT WE WERE ABOUT TO TAXI ONTO AN ACTIVE RWY; GAVE US A 180 DEGS; PROGRESSIVE TAXI INSTRUCTIONS AND A LITTLE BIT OF A TONGUE LASHING (WELL DESERVED).

Data retrieved from NASA's ASRS site as of January 2009 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.