Narrative:

Flight left the gate at XA23 with the following taxi instruction left on taxiway B -- right on taxiway V to taxiway D for runway 6R. When making a half right turn at taxiway D, the nose gear slid and braking action was nil. We didn't leave the taxiway but I was concerned about possibly hitting a taxi light, which we later confirmed we had not. We notified tower and returned to the gate for maintenance inspection. No damage was found, aircraft signed off, re-released and off the gate at XB23. We received the same taxi instructions for runway 6R. Taxiway D had been sanded since our previous taxi. We were cleared for takeoff from the taxiway. I entered the runway using extreme caution and moving very slowly, I began to center the nose gear after crossing the crown of the runway. We continued straight ahead and found we had no effective steering or braking action. Reversers were also ineffective. We left the runway on a 60 degree angle from the runway. I was not sure how far off the runway we were due to the snow and ice covering the runway. We notified the tower and airline maintenance arrived with a tow tug. I went to the cabin and talked to the passenger. The tug pushed the aircraft back on the runway. The main gears were still on the runway. We were then towed to the gate arriving at XC41. Aircraft was signed off and we ferried it to dfw. Many thanks to yyz maintenance and staff for their professionalism -- teamwork and help.

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Original NASA ASRS Text

Title: RWY CONDITION ICE SNOW -- ACR TRIED TWICE TO TAXI OUT AND TKOF AND SLIDES OFF OF THE RWY THE SECOND TIME.

Narrative: FLT LEFT THE GATE AT XA23 WITH THE FOLLOWING TAXI INSTRUCTION L ON TXWY B -- R ON TXWY V TO TXWY D FOR RWY 6R. WHEN MAKING A HALF R TURN AT TXWY D, THE NOSE GEAR SLID AND BRAKING ACTION WAS NIL. WE DIDN'T LEAVE THE TXWY BUT I WAS CONCERNED ABOUT POSSIBLY HITTING A TAXI LIGHT, WHICH WE LATER CONFIRMED WE HAD NOT. WE NOTIFIED TWR AND RETURNED TO THE GATE FOR MAINT INSPECTION. NO DAMAGE WAS FOUND, ACFT SIGNED OFF, RE-RELEASED AND OFF THE GATE AT XB23. WE RECEIVED THE SAME TAXI INSTRUCTIONS FOR RWY 6R. TXWY D HAD BEEN SANDED SINCE OUR PREVIOUS TAXI. WE WERE CLRED FOR TKOF FROM THE TXWY. I ENTERED THE RWY USING EXTREME CAUTION AND MOVING VERY SLOWLY, I BEGAN TO CTR THE NOSE GEAR AFTER XING THE CROWN OF THE RWY. WE CONTINUED STRAIGHT AHEAD AND FOUND WE HAD NO EFFECTIVE STEERING OR BRAKING ACTION. REVERSERS WERE ALSO INEFFECTIVE. WE LEFT THE RWY ON A 60 DEG ANGLE FROM THE RWY. I WAS NOT SURE HOW FAR OFF THE RWY WE WERE DUE TO THE SNOW AND ICE COVERING THE RWY. WE NOTIFIED THE TWR AND AIRLINE MAINT ARRIVED WITH A TOW TUG. I WENT TO THE CABIN AND TALKED TO THE PAX. THE TUG PUSHED THE ACFT BACK ON THE RWY. THE MAIN GEARS WERE STILL ON THE RWY. WE WERE THEN TOWED TO THE GATE ARRIVING AT XC41. ACFT WAS SIGNED OFF AND WE FERRIED IT TO DFW. MANY THANKS TO YYZ MAINT AND STAFF FOR THEIR PROFESSIONALISM -- TEAMWORK AND HELP.

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.