MD88 crew had runway incursion in runway 23 at taxiway Q at cyyz.

Attributes
ACN	517459
Time
Date	200107
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cyyz.airport
State Reference	ON
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : dxr.tower
Operator	common carrier : air carrier
Make Model Name	MD-88
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : multi engine
Experience	flight time last 90 days : 150 flight time total : 10.112 flight time type : 1800
ASRS Report	517459
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne less severe incursion : runway non adherence : published procedure non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued advisory controller : issued new clearance flight crew : became reoriented

Narrative:

Taxiing to runway 23 in yyz from terminal. We took taxiway a to taxiway H to taxiway Q for full length of runway 23. The captain stopped the aircraft on parallel taxiway Q prior to turning left to join runway 23. I was trying to figure out which tower was correct for that runway. They were not labeled. This would have possibly stopped the incursion. I chose the wrong frequency and was advised to switch to the other frequency. When I did, tower told us we were past the hold short line and cleared us for takeoff. He had traffic at the marker. If the tower frequencys were labeled appropriately, the tower controller may have stopped our incursion before it happened. Also, if the hold short lines were depicted on the airport diagram, the captain may have seen where the hold short lines were and stopped accordingly. My confusion over which frequency was correct took my attention from outside the plane to inside. I may have seen the hold short line if my attention was not diverted. Taxiway names are from memory and may be incorrect.

Original NASA ASRS Text

Title: MD88 CREW HAD RWY INCURSION IN RWY 23 AT TXWY Q AT CYYZ.

Narrative: TAXIING TO RWY 23 IN YYZ FROM TERMINAL. WE TOOK TXWY A TO TXWY H TO TXWY Q FOR FULL LENGTH OF RWY 23. THE CAPT STOPPED THE ACFT ON PARALLEL TXWY Q PRIOR TO TURNING L TO JOIN RWY 23. I WAS TRYING TO FIGURE OUT WHICH TWR WAS CORRECT FOR THAT RWY. THEY WERE NOT LABELED. THIS WOULD HAVE POSSIBLY STOPPED THE INCURSION. I CHOSE THE WRONG FREQ AND WAS ADVISED TO SWITCH TO THE OTHER FREQ. WHEN I DID, TWR TOLD US WE WERE PAST THE HOLD SHORT LINE AND CLRED US FOR TKOF. HE HAD TFC AT THE MARKER. IF THE TWR FREQS WERE LABELED APPROPRIATELY, THE TWR CTLR MAY HAVE STOPPED OUR INCURSION BEFORE IT HAPPENED. ALSO, IF THE HOLD SHORT LINES WERE DEPICTED ON THE ARPT DIAGRAM, THE CAPT MAY HAVE SEEN WHERE THE HOLD SHORT LINES WERE AND STOPPED ACCORDINGLY. MY CONFUSION OVER WHICH FREQ WAS CORRECT TOOK MY ATTN FROM OUTSIDE THE PLANE TO INSIDE. I MAY HAVE SEEN THE HOLD SHORT LINE IF MY ATTN WAS NOT DIVERTED. TXWY NAMES ARE FROM MEMORY AND MAY BE INCORRECT.

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.