Narrative:

Instruction was a distraction as there was a trainee with very few hours on the other departure position. Evasive action? I feel that would have been a 310 degree heading; which would have put the CRJ7 in the path of the next departure. CRJ7 departed runway 36R on a heading of about 025 degrees. MD80 departed runway 35L on basically runway heading. When I realized the situation; I instructed to maintain 4000 ft and turn left heading 340 degrees; away from the MD80 which luckily was slightly ahead and outclbing the CRJ7. How many times has this happened with an RNAV departure in the last several yrs? Probably 40-50 times! I believe that this time; as in most of the other near hits; that the flight crew put the wrong runway for departure into the flight computer. RNAV departures work great +99% of the time; but when they don't work; then luck is involved to keep from having a midair. Someday our luck will run out!

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Original NASA ASRS Text

Title: D10 CTLR DESCRIBED LOSS OF SEPARATION EVENT WHEN PARALLEL RWY DEP FAILED TO FLY ASSIGNED HEADING; WRONG FMS DEP RWY CITED AS PROBABLE.

Narrative: INSTRUCTION WAS A DISTR AS THERE WAS A TRAINEE WITH VERY FEW HRS ON THE OTHER DEP POS. EVASIVE ACTION? I FEEL THAT WOULD HAVE BEEN A 310 DEG HDG; WHICH WOULD HAVE PUT THE CRJ7 IN THE PATH OF THE NEXT DEP. CRJ7 DEPARTED RWY 36R ON A HDG OF ABOUT 025 DEGS. MD80 DEPARTED RWY 35L ON BASICALLY RWY HDG. WHEN I REALIZED THE SITUATION; I INSTRUCTED TO MAINTAIN 4000 FT AND TURN L HDG 340 DEGS; AWAY FROM THE MD80 WHICH LUCKILY WAS SLIGHTLY AHEAD AND OUTCLBING THE CRJ7. HOW MANY TIMES HAS THIS HAPPENED WITH AN RNAV DEP IN THE LAST SEVERAL YRS? PROBABLY 40-50 TIMES! I BELIEVE THAT THIS TIME; AS IN MOST OF THE OTHER NEAR HITS; THAT THE FLT CREW PUT THE WRONG RWY FOR DEP INTO THE FLT COMPUTER. RNAV DEPS WORK GREAT +99% OF THE TIME; BUT WHEN THEY DON'T WORK; THEN LUCK IS INVOLVED TO KEEP FROM HAVING A MIDAIR. SOMEDAY OUR LUCK WILL RUN OUT!

Data retrieved from NASA's ASRS site as of May 2009 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.