Narrative:

After clearing runway 31R at the end of taxiway P, we were instructed to hold short of runway 35C and monitor the tower frequency for that runway. As I turned the corner onto taxiway Y, I was watching a B757 taxiing on a parallel taxiway at right angles to ours. Once assured there would be no conflict with him at the intersection (he was cleared onto taxiway Z) I looked to make sure our nose was on the centerline of the taxiway Y while the first officer completed the after clearing runway checklist. When I looked to the left, I saw that I had already stuck my nose onto a runway about the same time as the tower asked who was the super 80 on taxiway Y. I idented myself by call sign as I finished crossing the runway 35C at the very end of its 13400 ft length. The controller instructed me to call him when I got to the gate, which I did quickly. No report was filed by ATC since lahso instructions had been issued to the aircraft on runway 35C that was completing its landing roll some distance down the runway. I admitted the fault was mine as I did not realize I was approaching the runway 35C so quickly. WX was no factor. Daylight VMC.

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Original NASA ASRS Text

Title: AN MD80 CREW CLRING RWY AT DFW CROSSED A RWY THEY WERE TO HOLD SHORT OF.

Narrative: AFTER CLRING RWY 31R AT THE END OF TXWY P, WE WERE INSTRUCTED TO HOLD SHORT OF RWY 35C AND MONITOR THE TWR FREQ FOR THAT RWY. AS I TURNED THE CORNER ONTO TXWY Y, I WAS WATCHING A B757 TAXIING ON A PARALLEL TXWY AT R ANGLES TO OURS. ONCE ASSURED THERE WOULD BE NO CONFLICT WITH HIM AT THE INTXN (HE WAS CLRED ONTO TXWY Z) I LOOKED TO MAKE SURE OUR NOSE WAS ON THE CTRLINE OF THE TXWY Y WHILE THE FO COMPLETED THE AFTER CLRING RWY CHKLIST. WHEN I LOOKED TO THE L, I SAW THAT I HAD ALREADY STUCK MY NOSE ONTO A RWY ABOUT THE SAME TIME AS THE TWR ASKED WHO WAS THE SUPER 80 ON TXWY Y. I IDENTED MYSELF BY CALL SIGN AS I FINISHED XING THE RWY 35C AT THE VERY END OF ITS 13400 FT LENGTH. THE CTLR INSTRUCTED ME TO CALL HIM WHEN I GOT TO THE GATE, WHICH I DID QUICKLY. NO RPT WAS FILED BY ATC SINCE LAHSO INSTRUCTIONS HAD BEEN ISSUED TO THE ACFT ON RWY 35C THAT WAS COMPLETING ITS LNDG ROLL SOME DISTANCE DOWN THE RWY. I ADMITTED THE FAULT WAS MINE AS I DID NOT REALIZE I WAS APCHING THE RWY 35C SO QUICKLY. WX WAS NO FACTOR. DAYLIGHT VMC.

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.