Narrative:

Taxiing for takeoff at dfw contacted west side ground control. We were told to hold short of runway 36R and change to tower. Tower controller instructed us to cross runway 36R and hold short of runway 36L. We read back the clearance and began to taxi. As we were crossing runway 36R, tower asked if we would be ready when we reached runway 36L. We acknowledged with an affirmative. We were then cleared by the tower to takeoff on runway 36L. While we were in the takeoff roll we heard a takeoff clearance canceled for another aircraft by the tower controller. It was not for us so we continued the takeoff. Once airborne the controller told us we had just departed off a closed runway which happened to be runway 36L. He informed us that we had been cleared over to runway 31L with a frequency change to another tower frequency. He then asked us to stand by for the tower phone number and the supervisor's name and were instructed to call when we reached our destination. Upon arrival at our destination we called the dfw tower supervisor who had already reviewed the tower tapes. He informed us that we had been correctly cleared off of runway 36L and that it had been deemed controller error. The supervisor had cited improper phraseology by the controller as a contributing factor. The supervisor told us there had been a runway incursion due to the closure of the last part of runway 36L. Contributing factors to this situation would be, 1) not being informed of the runway closure, 2) tower asking if we would be ready to go upon reaching runway 36L. This put us in the mindset that we would be departing on this runway and once we were cleared for takeoff on this runway everything seemed normal.

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Original NASA ASRS Text

Title: ATCT LCL CTLR CLRED AN ACR E120 FOR TKOF ON RWY 36L. ONCE AIRBORNE TWR TOLD FLC TO CALL THE TWR AFTER LNDG AS THEY HAD DEPARTED ON A CLOSED RWY. SUBSEQUENT CONVERSATION WITH TWR SUPVR INDICATED IT WAS THE TWR CTLR'S ERROR.

Narrative: TAXIING FOR TKOF AT DFW CONTACTED W SIDE GND CTL. WE WERE TOLD TO HOLD SHORT OF RWY 36R AND CHANGE TO TWR. TWR CTLR INSTRUCTED US TO CROSS RWY 36R AND HOLD SHORT OF RWY 36L. WE READ BACK THE CLRNC AND BEGAN TO TAXI. AS WE WERE XING RWY 36R, TWR ASKED IF WE WOULD BE READY WHEN WE REACHED RWY 36L. WE ACKNOWLEDGED WITH AN AFFIRMATIVE. WE WERE THEN CLRED BY THE TWR TO TKOF ON RWY 36L. WHILE WE WERE IN THE TKOF ROLL WE HEARD A TKOF CLRNC CANCELED FOR ANOTHER ACFT BY THE TWR CTLR. IT WAS NOT FOR US SO WE CONTINUED THE TKOF. ONCE AIRBORNE THE CTLR TOLD US WE HAD JUST DEPARTED OFF A CLOSED RWY WHICH HAPPENED TO BE RWY 36L. HE INFORMED US THAT WE HAD BEEN CLRED OVER TO RWY 31L WITH A FREQ CHANGE TO ANOTHER TWR FREQ. HE THEN ASKED US TO STAND BY FOR THE TWR PHONE NUMBER AND THE SUPVR'S NAME AND WERE INSTRUCTED TO CALL WHEN WE REACHED OUR DEST. UPON ARR AT OUR DEST WE CALLED THE DFW TWR SUPVR WHO HAD ALREADY REVIEWED THE TWR TAPES. HE INFORMED US THAT WE HAD BEEN CORRECTLY CLRED OFF OF RWY 36L AND THAT IT HAD BEEN DEEMED CTLR ERROR. THE SUPVR HAD CITED IMPROPER PHRASEOLOGY BY THE CTLR AS A CONTRIBUTING FACTOR. THE SUPVR TOLD US THERE HAD BEEN A RWY INCURSION DUE TO THE CLOSURE OF THE LAST PART OF RWY 36L. CONTRIBUTING FACTORS TO THIS SIT WOULD BE, 1) NOT BEING INFORMED OF THE RWY CLOSURE, 2) TWR ASKING IF WE WOULD BE READY TO GO UPON REACHING RWY 36L. THIS PUT US IN THE MINDSET THAT WE WOULD BE DEPARTING ON THIS RWY AND ONCE WE WERE CLRED FOR TKOF ON THIS RWY EVERYTHING SEEMED NORMAL.

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.