Air carrier small transport on takeoff roll saw another aircraft cross the active runway at an intersection downfield. Small transport continued his takeoff and passed approximately 200 ft over the other aircraft.

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Attributes
ACN	259240
Time
Date	199312
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dtw
State Reference	MI
Altitude	agl bound lower : 0 agl bound upper : 200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : tpa
Operator	common carrier : air carrier
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : initial climbout : takeoff
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	ground other : taxi
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 210 flight time total : 3000 flight time type : 1000
ASRS Report	259240
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : ground less severe
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	vertical : 200
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Deviation

Narrative:

We were cleared for takeoff on runway 21C at dtw. We had set takeoff power and were accelerating through 100 KTS (about 5 KTS below V1) when I saw another act crossing runway 21C at taxiway F. The captain and I decided that continuing the takeoff would place us safely over the taxiing aircraft. If we had aborted I think we would have either hit the taxiing act or rolled in to the grass. I think the crew of the other aircraft, mid-way through the runway, saw us because they accelerated their taxi. By the time we reached intersection F we were 200 ft above the aircraft and their tail was exiting the runway. The captain reconfirmed our clearance for takeoff and it was confirmed by the controller. I think the controller did not see if we had actually taken off before he cleared the other aircraft to taxi across runway 21C. I don't think the controller knew what had happened.

Original NASA ASRS Text

Title: ACR SMT ON TKOF ROLL SAW ANOTHER ACFT CROSS THE ACTIVE RWY AT AN INTXN DOWNFIELD. SMT CONTINUED HIS TKOF AND PASSED APPROX 200 FT OVER THE OTHER ACFT.

Narrative: WE WERE CLRED FOR TKOF ON RWY 21C AT DTW. WE HAD SET TKOF PWR AND WERE ACCELERATING THROUGH 100 KTS (ABOUT 5 KTS BELOW V1) WHEN I SAW ANOTHER ACT XING RWY 21C AT TXWY F. THE CAPT AND I DECIDED THAT CONTINUING THE TKOF WOULD PLACE US SAFELY OVER THE TAXIING ACFT. IF WE HAD ABORTED I THINK WE WOULD HAVE EITHER HIT THE TAXIING ACT OR ROLLED IN TO THE GRASS. I THINK THE CREW OF THE OTHER ACFT, MID-WAY THROUGH THE RWY, SAW US BECAUSE THEY ACCELERATED THEIR TAXI. BY THE TIME WE REACHED INTXN F WE WERE 200 FT ABOVE THE ACFT AND THEIR TAIL WAS EXITING THE RWY. THE CAPT RECONFIRMED OUR CLRNC FOR TKOF AND IT WAS CONFIRMED BY THE CTLR. I THINK THE CTLR DID NOT SEE IF WE HAD ACTUALLY TAKEN OFF BEFORE HE CLRED THE OTHER ACFT TO TAXI ACROSS RWY 21C. I DON'T THINK THE CTLR KNEW WHAT HAD HAPPENED.

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.