Narrative:

We were #1 at the taxiway H intersection for runway 18L. Both my first officer check airman and I heard tower clear us to position and hold runway 18L. The first officer acknowledged and confirmed the clearance and we started to taxi across the hold line for the runway. We were about 10 ft beyond the hold line when I noticed an rj taxiing across the hold line right next to us and continued on to position and hold. We informed the tower we were across the hold line. It was a big surprise to her and she asked why we taxied across the line. We told her we both heard her clearance 'air carrier X, position and hold,' she cleared the other aircraft for takeoff and she then again cleared us into position and hold. The rest of the flight was non-eventful.

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Original NASA ASRS Text

Title: AN MD80 FLT CREW CROSS THE HOLD LINE TO RWY 18L AT DFW BECAUSE THEY THOUGHT THAT THEY WERE CLRED IN POS. THE CLRNC WAS SUPPOSED TO BE FOR ANOTHER ACFT.

Narrative: WE WERE #1 AT THE TXWY H INTXN FOR RWY 18L. BOTH MY FO CHK AIRMAN AND I HEARD TWR CLR US TO POS AND HOLD RWY 18L. THE FO ACKNOWLEDGED AND CONFIRMED THE CLRNC AND WE STARTED TO TAXI ACROSS THE HOLD LINE FOR THE RWY. WE WERE ABOUT 10 FT BEYOND THE HOLD LINE WHEN I NOTICED AN RJ TAXIING ACROSS THE HOLD LINE RIGHT NEXT TO US AND CONTINUED ON TO POS AND HOLD. WE INFORMED THE TWR WE WERE ACROSS THE HOLD LINE. IT WAS A BIG SURPRISE TO HER AND SHE ASKED WHY WE TAXIED ACROSS THE LINE. WE TOLD HER WE BOTH HEARD HER CLRNC 'ACR X, POS AND HOLD,' SHE CLRED THE OTHER ACFT FOR TKOF AND SHE THEN AGAIN CLRED US INTO POS AND HOLD. THE REST OF THE FLT WAS NON-EVENTFUL.

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.