Narrative:

I was taxiing the aircraft for departure at lga for takeoff and had been cleared by ground to taxi to runway 4. There is a runway hold short line (designated 'B4 hold line') prior to reaching the approach end of runway 4. I thought that was our clearance limit. As it turns out, there was a notice on the end of the ATIS that advised that lga had an ILS runway 4 hold short line program in effect. As we proceeded past the ILS runway 4 hold short line, the tower or ground (I am not sure which) called to advise that we were supposed to hold short of the ILS runway 4 hold short line. They explained that it was for wingtip clearance with the landing traffic. Given that the traffic on final was not yet close enough to be a factor we were instructed to continue taxiing to the other side of the runway and clear off onto taxiway aa, continue north and turn around in the vicinity of taxiway aa and taxiway cy. While we were on taxiway aa, the traffic that was on final to runway 4 landed without incident. We were then directed to taxi onto the runway a taxiway Y and back-taxi on the runway for departure. This we did and were cleared for takeoff. Contributing factors to this occurrence include the fact that I did not listen to the ATIS. (My partner had picked up the ATIS and clearance). Given that the WX was clear, even if I had heard the ATIS, I am not sure I would have understood that the ILS runway 4 hold short program while in affect was applicable to VFR WX and for the purposes of wingtip clearance with landing aircraft. Also, I believed that we had been cleared to taxi to runway 4 without additional instructions to stop at the ILS hold short line. I did hear the aircraft behind us being instructed to stop at the ILS hold short line after we had passed it.

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Original NASA ASRS Text

Title: DHC8 CREW ON TAXI OUT FAILED TO HOLD SHORT OF THE ILS RWY 4 HOLD LINE.

Narrative: I WAS TAXIING THE ACFT FOR DEP AT LGA FOR TKOF AND HAD BEEN CLRED BY GND TO TAXI TO RWY 4. THERE IS A RWY HOLD SHORT LINE (DESIGNATED 'B4 HOLD LINE') PRIOR TO REACHING THE APCH END OF RWY 4. I THOUGHT THAT WAS OUR CLRNC LIMIT. AS IT TURNS OUT, THERE WAS A NOTICE ON THE END OF THE ATIS THAT ADVISED THAT LGA HAD AN ILS RWY 4 HOLD SHORT LINE PROGRAM IN EFFECT. AS WE PROCEEDED PAST THE ILS RWY 4 HOLD SHORT LINE, THE TWR OR GND (I AM NOT SURE WHICH) CALLED TO ADVISE THAT WE WERE SUPPOSED TO HOLD SHORT OF THE ILS RWY 4 HOLD SHORT LINE. THEY EXPLAINED THAT IT WAS FOR WINGTIP CLRNC WITH THE LNDG TFC. GIVEN THAT THE TFC ON FINAL WAS NOT YET CLOSE ENOUGH TO BE A FACTOR WE WERE INSTRUCTED TO CONTINUE TAXIING TO THE OTHER SIDE OF THE RWY AND CLR OFF ONTO TXWY AA, CONTINUE N AND TURN AROUND IN THE VICINITY OF TXWY AA AND TXWY CY. WHILE WE WERE ON TXWY AA, THE TFC THAT WAS ON FINAL TO RWY 4 LANDED WITHOUT INCIDENT. WE WERE THEN DIRECTED TO TAXI ONTO THE RWY A TXWY Y AND BACK-TAXI ON THE RWY FOR DEP. THIS WE DID AND WERE CLRED FOR TKOF. CONTRIBUTING FACTORS TO THIS OCCURRENCE INCLUDE THE FACT THAT I DID NOT LISTEN TO THE ATIS. (MY PARTNER HAD PICKED UP THE ATIS AND CLRNC). GIVEN THAT THE WX WAS CLR, EVEN IF I HAD HEARD THE ATIS, I AM NOT SURE I WOULD HAVE UNDERSTOOD THAT THE ILS RWY 4 HOLD SHORT PROGRAM WHILE IN AFFECT WAS APPLICABLE TO VFR WX AND FOR THE PURPOSES OF WINGTIP CLRNC WITH LNDG ACFT. ALSO, I BELIEVED THAT WE HAD BEEN CLRED TO TAXI TO RWY 4 WITHOUT ADDITIONAL INSTRUCTIONS TO STOP AT THE ILS HOLD SHORT LINE. I DID HEAR THE ACFT BEHIND US BEING INSTRUCTED TO STOP AT THE ILS HOLD SHORT LINE AFTER WE HAD PASSED IT.

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.