Narrative:

May, 2001 at approximately XD30 hours. I was cleared to taxi and cross two paralleling runways at dfw, runways 18R and 18L. My clearance was to cross the runway at intersection 'week' and turn right on taxiway 'F.' upon clearing the last runway, 18L I saw a taxi sign 'F2.' I made the right turn on 'F2' thinking it would lead to taxiway 'F,' only to find out that it was the high-speed from runway 18L. As I realized my mistake I had already entered the runway and immediately exited at 'F3' a few yards ahead and joined taxiway 'F.' this incursion occurred because of my unfamiliarity with the airport and in order to prevent this from happening to any other fellow pilots my advice would be, if you are not familiar with a particular high density airport, get checked out with another pilot who is familiar and when in doubt in these sits, stop in your tracks and ask for progressives from ground control. Supplemental information from acn 511135: we were cleared for a night IMC takeoff on runway 18L. During takeoff roll at approximately 130 KTS and just prior to V1 we encountered a dimly lit 'dim navigation lights only' unauthorized twin turboprop on the runway in front of us within 1000 ft and too close for us to abort. We veered sharply to the right and initiated early rotation. Fortunately the unauthorized aircraft was left of centerline so we passed just off his right side prior to us lifting off at the far right edge of the runway. Estimated lateral miss distance was less than a few ft with unknown vertical separation. After becoming airborne between V1 and V2 we held the nose down and were able to maneuver back over the runway surface as we accelerated in level flight to normal climb speed. Rest of climb out was uneventful although we needed to make an immediate call back to tower controller in an attempt to prevent takeoff clearance of the next aircraft. After ensuring no impact with the turboprop nor any over boost of the engines we continued on to mdw. Passengers were told enroute that the abrupt and abnormal maneuvering on takeoff was due to an unauthorized object on the runway that we were able to avoid. Flight attendants were both a bit shaken but ok. Passengers seemed in good spirits upon arrival in mdw with only a few having more questions. Near miss may have been more easily avoided by bright lighting on the wandering aircraft with perhaps a bit tighter tower control. However, in their defense, the aircraft was near impossible to see at long range with its dim lights. Callback conversation with reporter revealed the following information: reporter stated that he was PF.

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Original NASA ASRS Text

Title: SW4 TAXIES ONTO RWY 18L AT DFW, WHILE AN F100 IS ON ITS TKOF ROLL, WHICH HAD TO SWERVE TO MISS THE ACFT.

Narrative: MAY, 2001 AT APPROX XD30 HRS. I WAS CLRED TO TAXI AND CROSS TWO PARALLELING RWYS AT DFW, RWYS 18R AND 18L. MY CLRNC WAS TO CROSS THE RWY AT INTERSECTION 'WK' AND TURN R ON TXWY 'F.' UPON CLRING THE LAST RWY, 18L I SAW A TAXI SIGN 'F2.' I MADE THE R TURN ON 'F2' THINKING IT WOULD LEAD TO TXWY 'F,' ONLY TO FIND OUT THAT IT WAS THE HIGH-SPEED FROM RWY 18L. AS I REALIZED MY MISTAKE I HAD ALREADY ENTERED THE RWY AND IMMEDIATELY EXITED AT 'F3' A FEW YARDS AHEAD AND JOINED TXWY 'F.' THIS INCURSION OCCURRED BECAUSE OF MY UNFAMILIARITY WITH THE AIRPORT AND IN ORDER TO PREVENT THIS FROM HAPPENING TO ANY OTHER FELLOW PLTS MY ADVICE WOULD BE, IF YOU ARE NOT FAMILIAR WITH A PARTICULAR HIGH DENSITY AIRPORT, GET CHECKED OUT WITH ANOTHER PLT WHO IS FAMILIAR AND WHEN IN DOUBT IN THESE SITS, STOP IN YOUR TRACKS AND ASK FOR PROGRESSIVES FROM GND CTL. SUPPLEMENTAL INFO FROM ACN 511135: WE WERE CLRED FOR A NIGHT IMC TAKEOFF ON RWY 18L. DURING TKOF ROLL AT APPROX 130 KTS AND JUST PRIOR TO V1 WE ENCOUNTERED A DIMLY LIT 'DIM NAV LIGHTS ONLY' UNAUTHORIZED TWIN TURBOPROP ON THE RWY IN FRONT OF US WITHIN 1000 FT AND TOO CLOSE FOR US TO ABORT. WE VEERED SHARPLY TO THE R AND INITIATED EARLY ROTATION. FORTUNATELY THE UNAUTHORIZED ACFT WAS L OF CTRLINE SO WE PASSED JUST OFF HIS R SIDE PRIOR TO US LIFTING OFF AT THE FAR R EDGE OF THE RWY. ESTIMATED LATERAL MISS DISTANCE WAS LESS THAN A FEW FT WITH UNKNOWN VERTICAL SEPARATION. AFTER BECOMING AIRBORNE BETWEEN V1 AND V2 WE HELD THE NOSE DOWN AND WERE ABLE TO MANEUVER BACK OVER THE RWY SURFACE AS WE ACCELERATED IN LEVEL FLT TO NORMAL CLIMB SPEED. REST OF CLIMB OUT WAS UNEVENTFUL ALTHOUGH WE NEEDED TO MAKE AN IMMEDIATE CALL BACK TO TWR CTLR IN AN ATTEMPT TO PREVENT TAKEOFF CLRNC OF THE NEXT ACFT. AFTER ENSURING NO IMPACT WITH THE TURBOPROP NOR ANY OVER BOOST OF THE ENGINES WE CONTINUED ON TO MDW. PASSENGERS WERE TOLD ENROUTE THAT THE ABRUPT AND ABNORMAL MANEUVERING ON TKOF WAS DUE TO AN UNAUTHORIZED OBJECT ON THE RWY THAT WE WERE ABLE TO AVOID. FLT ATTENDANTS WERE BOTH A BIT SHAKEN BUT OK. PASSENGERS SEEMED IN GOOD SPIRITS UPON ARRIVAL IN MDW WITH ONLY A FEW HAVING MORE QUESTIONS. NEAR MISS MAY HAVE BEEN MORE EASILY AVOIDED BY BRIGHT LIGHTING ON THE WANDERING ACFT WITH PERHAPS A BIT TIGHTER TWR CTL. HOWEVER, IN THEIR DEFENSE, THE ACFT WAS NEAR IMPOSSIBLE TO SEE AT LONG RANGE WITH ITS DIM LIGHTS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT HE WAS PF.

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.