Narrative:

Lga - landing runway 31 departure, runway 4, standard for WX and wind at the time. I was PIC in a da-50 positioning to pick up 3 passenger to take them to skbo (bogota, columbia) we had a mechanic in the jumpseat which is SOP for our international/operations - no passenger. After landing we were asked by tower if we could turn off at the high speed taxiway (that joined 'O') we said we could (again standard roll out of our aircraft using that runway) both pilots (senior pilots) have significant experience in da-50 and lga operations. As we turned off runway we were told to call ground control. I did, our taxi instructions were - 'outer - fox - hold short of runway 4.' this was a standard clearance both crewmembers would expect. I read back taxi clearance including, 'hold short of runway 4.' as I read the clearance back I looked toward the pilot to make sure he had heard the transmission. His nodding gesture indicated to me that he heard it - I do not specifically remember if he verbally repeated 'short of runway 4.' I was convinced everyone was clear as to taxi instructions. I was asked to do the after landing checklist, which I initiated shortly after taxi clearance was received. As we were taxiing I announced that I was starting the APU, (standard procedure for this type of turn around). As I initiated the start on the APU -- our EFIS tubes showed error messages and the tube went black momentarily, this is abnormal for an APU start in this confign. I was monitoring the start as well as the problem, which appeared to be a momentary power surge. Our mechanic was also monitoring the start as well since both pilots indicated that there was a problem. When I looked up from the APU panel I saw runway 4 approaching and told the pilot taxiing the aircraft to stop -- at the same time ground controller came on frequency and said, 'hold, hold, hold.' the aircraft was moving very slowly during our taxi.I announced to ground control that we were holding short of runway 4 and we were stopped. Our aircraft had passed the hold line which was now below the wing, the aircraft was well short of the runway. The tower had just cleared an air carrier for takeoff as we approached the hold line for runway 4 at fox. The tower canceled the takeoff clearance shortly after the air carrier started his takeoff roll. The pilot taxiing said he was aware of the need to hold short but was monitoring our problem as was I and the mechanic. Classic no one watching the store.

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Original NASA ASRS Text

Title: RWY EXCURSION - FLC FAILED TO HOLD SHORT OF THE RWY (IE, SHORT OF THE 'HOLD SHORT' LINE).

Narrative: LGA - LNDG RWY 31 DEP, RWY 4, STANDARD FOR WX AND WIND AT THE TIME. I WAS PIC IN A DA-50 POSITIONING TO PICK UP 3 PAX TO TAKE THEM TO SKBO (BOGOTA, COLUMBIA) WE HAD A MECH IN THE JUMPSEAT WHICH IS SOP FOR OUR INTL/OPS - NO PAX. AFTER LNDG WE WERE ASKED BY TWR IF WE COULD TURN OFF AT THE HIGH SPD TXWY (THAT JOINED 'O') WE SAID WE COULD (AGAIN STANDARD ROLL OUT OF OUR ACFT USING THAT RWY) BOTH PLTS (SENIOR PLTS) HAVE SIGNIFICANT EXPERIENCE IN DA-50 AND LGA OPS. AS WE TURNED OFF RWY WE WERE TOLD TO CALL GND CTL. I DID, OUR TAXI INSTRUCTIONS WERE - 'OUTER - FOX - HOLD SHORT OF RWY 4.' THIS WAS A STANDARD CLRNC BOTH CREWMEMBERS WOULD EXPECT. I READ BACK TAXI CLRNC INCLUDING, 'HOLD SHORT OF RWY 4.' AS I READ THE CLRNC BACK I LOOKED TOWARD THE PLT TO MAKE SURE HE HAD HEARD THE XMISSION. HIS NODDING GESTURE INDICATED TO ME THAT HE HEARD IT - I DO NOT SPECIFICALLY REMEMBER IF HE VERBALLY REPEATED 'SHORT OF RWY 4.' I WAS CONVINCED EVERYONE WAS CLR AS TO TAXI INSTRUCTIONS. I WAS ASKED TO DO THE AFTER LNDG CHKLIST, WHICH I INITIATED SHORTLY AFTER TAXI CLRNC WAS RECEIVED. AS WE WERE TAXIING I ANNOUNCED THAT I WAS STARTING THE APU, (STANDARD PROC FOR THIS TYPE OF TURN AROUND). AS I INITIATED THE START ON THE APU -- OUR EFIS TUBES SHOWED ERROR MESSAGES AND THE TUBE WENT BLACK MOMENTARILY, THIS IS ABNORMAL FOR AN APU START IN THIS CONFIGN. I WAS MONITORING THE START AS WELL AS THE PROB, WHICH APPEARED TO BE A MOMENTARY PWR SURGE. OUR MECH WAS ALSO MONITORING THE START AS WELL SINCE BOTH PLTS INDICATED THAT THERE WAS A PROB. WHEN I LOOKED UP FROM THE APU PANEL I SAW RWY 4 APCHING AND TOLD THE PLT TAXIING THE ACFT TO STOP -- AT THE SAME TIME GND CTLR CAME ON FREQ AND SAID, 'HOLD, HOLD, HOLD.' THE ACFT WAS MOVING VERY SLOWLY DURING OUR TAXI.I ANNOUNCED TO GND CTL THAT WE WERE HOLDING SHORT OF RWY 4 AND WE WERE STOPPED. OUR ACFT HAD PASSED THE HOLD LINE WHICH WAS NOW BELOW THE WING, THE ACFT WAS WELL SHORT OF THE RWY. THE TWR HAD JUST CLRED AN ACR FOR TKOF AS WE APCHED THE HOLD LINE FOR RWY 4 AT FOX. THE TWR CANCELED THE TKOF CLRNC SHORTLY AFTER THE ACR STARTED HIS TKOF ROLL. THE PLT TAXIING SAID HE WAS AWARE OF THE NEED TO HOLD SHORT BUT WAS MONITORING OUR PROB AS WAS I AND THE MECH. CLASSIC NO ONE WATCHING THE STORE.

Data retrieved from NASA's ASRS site as of July 2007 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.