Narrative:

We were taxiing to runway 23 for takeoff. From taxiway H, turned right onto taxiway Q. Realized that hold line for runway 23 was at entrance to taxiway Q, so stopped. Nose of aircraft went over hold line (approximately 25 ft of aircraft went over hold line). Taxiway Q is depicted as a parallel taxiway to runway 23, but slants toward it, so this is probably why hold line is on the parallel taxiway Q. No aircraft were landing during this time and a dash 8 was in position on runway 23 at intersection H, so there was no traffic conflict. We did not enter runway 23 until later cleared, but at this time did partially cross the hold line (which, again, is on the parallel). I had just read from the commercial chart page that the hold line was at the entrance to taxiway Q, but when we got there and the dash 8 was making an intersection takeoff from taxiway H, I asked the first officer if our takeoff data was for full length or taxiway H. As he was checking, this took him out of the loop, and for some reason it didn't register about the unusual hold line until I committed to the turn. I stopped and we weren't actually close to the runway, but the tower controller seemed concerned (a couple mins later) when she cleared us on the runway and for takeoff. Personally, I feel safety was not compromised but am filing this report for informational purposes. Supplemental information from acn 552409: we were taxiing out for takeoff on runway 23. We were following an air carrier Y flight. We had planned for a full length takeoff. Air carrier Y was given the intersection takeoff at taxiway J/H. The captain suggested I get the data for this. I went heads down and pulled the information from ACARS. Tower then called and said we crossed the hold line, but taxi into position and hold on runway 23. We were aware of the location before taxiing, but I should have watched for the line, not the data. Cause was improper attention on my part and distraction on the captain's part.

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Original NASA ASRS Text

Title: B737 CREW TAXIING FOR TKOF AT CYYZ, CROSSED THE HOLD SHORT LINE FOR THEIR DEP RWY.

Narrative: WE WERE TAXIING TO RWY 23 FOR TKOF. FROM TXWY H, TURNED R ONTO TXWY Q. REALIZED THAT HOLD LINE FOR RWY 23 WAS AT ENTRANCE TO TXWY Q, SO STOPPED. NOSE OF ACFT WENT OVER HOLD LINE (APPROX 25 FT OF ACFT WENT OVER HOLD LINE). TXWY Q IS DEPICTED AS A PARALLEL TXWY TO RWY 23, BUT SLANTS TOWARD IT, SO THIS IS PROBABLY WHY HOLD LINE IS ON THE PARALLEL TXWY Q. NO ACFT WERE LNDG DURING THIS TIME AND A DASH 8 WAS IN POS ON RWY 23 AT INTXN H, SO THERE WAS NO TFC CONFLICT. WE DID NOT ENTER RWY 23 UNTIL LATER CLRED, BUT AT THIS TIME DID PARTIALLY CROSS THE HOLD LINE (WHICH, AGAIN, IS ON THE PARALLEL). I HAD JUST READ FROM THE COMMERCIAL CHART PAGE THAT THE HOLD LINE WAS AT THE ENTRANCE TO TXWY Q, BUT WHEN WE GOT THERE AND THE DASH 8 WAS MAKING AN INTXN TKOF FROM TXWY H, I ASKED THE FO IF OUR TKOF DATA WAS FOR FULL LENGTH OR TXWY H. AS HE WAS CHKING, THIS TOOK HIM OUT OF THE LOOP, AND FOR SOME REASON IT DIDN'T REGISTER ABOUT THE UNUSUAL HOLD LINE UNTIL I COMMITTED TO THE TURN. I STOPPED AND WE WEREN'T ACTUALLY CLOSE TO THE RWY, BUT THE TWR CTLR SEEMED CONCERNED (A COUPLE MINS LATER) WHEN SHE CLRED US ON THE RWY AND FOR TKOF. PERSONALLY, I FEEL SAFETY WAS NOT COMPROMISED BUT AM FILING THIS RPT FOR INFORMATIONAL PURPOSES. SUPPLEMENTAL INFO FROM ACN 552409: WE WERE TAXIING OUT FOR TKOF ON RWY 23. WE WERE FOLLOWING AN ACR Y FLT. WE HAD PLANNED FOR A FULL LENGTH TKOF. ACR Y WAS GIVEN THE INTXN TKOF AT TXWY J/H. THE CAPT SUGGESTED I GET THE DATA FOR THIS. I WENT HEADS DOWN AND PULLED THE INFO FROM ACARS. TWR THEN CALLED AND SAID WE CROSSED THE HOLD LINE, BUT TAXI INTO POS AND HOLD ON RWY 23. WE WERE AWARE OF THE LOCATION BEFORE TAXIING, BUT I SHOULD HAVE WATCHED FOR THE LINE, NOT THE DATA. CAUSE WAS IMPROPER ATTN ON MY PART AND DISTR ON THE CAPT'S PART.

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.