Narrative:

At the suggestion of our recurrent training school we began a new procedure whereby right after touchdown the right seat (PNF) would extend the air brakes -- even though the automatic system has them deployed already. When the PNF pulled the handle as above we received a takeoff confign horn which could not be silenced until clear of the runway by retracting the flaps. While this horn was going off the tower operator told us to hold short of a parallel runway which is very close to the runway we had just cleared. We didn't hear the 'hold short of runway 31L' because of the horn and changing to ground control, by which time it was too late. We were already crossing the left runway (31L) and a small cessna was taking off from and in fact flew over our aircraft by about 100 ft vertical. Also a problem at this airport (mdw) is the fact that this runway (31L) has not been used for a couple of yrs, all the time I've gotten used to crossing it without problem. I was aware that lately it was being used, but old habit patterns are hard to break. Especially with a warning horn going off in your ear.

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Original NASA ASRS Text

Title: FLC OF A MLG TAXIED ACROSS A PARALLEL ACTIVE RWY CONTRARY TO ATC HOLD-SHORT INSTRUCTIONS CAUSING A GND CRITICAL CONFLICT WITH ANOTHER ACFT TAKING-OFF.

Narrative: AT THE SUGGESTION OF OUR RECURRENT TRAINING SCHOOL WE BEGAN A NEW PROC WHEREBY RIGHT AFTER TOUCHDOWN THE R SEAT (PNF) WOULD EXTEND THE AIR BRAKES -- EVEN THOUGH THE AUTO SYS HAS THEM DEPLOYED ALREADY. WHEN THE PNF PULLED THE HANDLE AS ABOVE WE RECEIVED A TKOF CONFIGN HORN WHICH COULD NOT BE SILENCED UNTIL CLR OF THE RWY BY RETRACTING THE FLAPS. WHILE THIS HORN WAS GOING OFF THE TWR OPERATOR TOLD US TO HOLD SHORT OF A PARALLEL RWY WHICH IS VERY CLOSE TO THE RWY WE HAD JUST CLRED. WE DIDN'T HEAR THE 'HOLD SHORT OF RWY 31L' BECAUSE OF THE HORN AND CHANGING TO GND CTL, BY WHICH TIME IT WAS TOO LATE. WE WERE ALREADY XING THE L RWY (31L) AND A SMALL CESSNA WAS TAKING OFF FROM AND IN FACT FLEW OVER OUR ACFT BY ABOUT 100 FT VERT. ALSO A PROB AT THIS ARPT (MDW) IS THE FACT THAT THIS RWY (31L) HAS NOT BEEN USED FOR A COUPLE OF YRS, ALL THE TIME I'VE GOTTEN USED TO XING IT WITHOUT PROB. I WAS AWARE THAT LATELY IT WAS BEING USED, BUT OLD HABIT PATTERNS ARE HARD TO BREAK. ESPECIALLY WITH A WARNING HORN GOING OFF IN YOUR EAR.

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.