Medium Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Confusion; Communication Breakdown
Conflict Ground Conflict; Less Severe; Deviation / Discrepancy - Procedural Clearance; Ground Event / Encounter Other / Unknown; Ground Incursion Runway
General None Reported / Taken
ATC Equipment / Nav Facility / Buildings; Airport; Procedure; Human Factors; Environment - Non Weather Related
Taxi out for takeoff on Runway 24L. On Tower frequency received clearance to cross 24R to hold short of approach of 24L. After crossing 24R and approximately 100 yards short of hold line for 24L we were told to stop. Tower Controller then asked landing traffic on 24L if he was comfortable landing as an aircraft was inside the approach zone for 24L. The aircraft on a visual approach indicated that it was not a problem and landed. We then heard other aircraft on the frequency receiving a similar clearance to cross 24R and the Controller then emphasized and added hold short of the '24L approach sign.' We did not recall hearing this clearance referring to the sign nor do we recall seeing a sign of this nature. No other comment was made and we were next for takeoff and departed without further incident. We reviewed all taxi charts prior to taxi out and after incident and could not find any reference to the 'Approach Sign.'
An Air Carrier crew failed to detect the CYYZ Runway '24L Approach' sign and were advised by ATC after they crossed the hold line that they had a runway incursion.