CE750 flight crew aborts takeoff after sighting B737 about to cross the runway at mdw.

Attributes
ACN	568599
Time
Date	200212
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mdw.airport
State Reference	IL
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Citation X
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : mdw.tower
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 100 flight time total : 15500 flight time type : 2000
ASRS Report	568599
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Events
Anomaly	conflict : ground less severe incursion : runway non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera other flight crewa other flight crewb
Resolutory Action	controller : issued alert flight crew : rejected takeoff
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure Operational Deviation

Narrative:

Cleared for takeoff runway 31C at mdw. As we began to roll, noticed B737 taxiing at very high speed from left to right. It was obvious he was going to cross our runway approximately 150 yards from departure end. PF aborted takeoff at the same time as tower controller said 'stop, stop, stop!' B737 continued across runway without slowing down. We both saw this coming and got the airplane stopped well short of the intersection. Called tower on phone after trip. He claimed tower canceled our takeoff clearance immediately after giving it. I am speculating that I was answering takeoff clearance on the radio at the same time he was canceling, so we blocked each other. B737 was probably on ground control and heard nothing. Callback conversation with reporter revealed the following information: reporter stated that he was cleared into position and hold and subsequently cleared for takeoff. Reporter stated that aircraft Y was crossing in the area of taxiway a and taxiway B and that his aircraft barely got rolling and stopped prior to the taxiway K intersection. Reporter stated that in the telephone conversation with the tower controller, the controller did not mention having checked the tower tapes. Reporter stated that all of his aircraft's lights were on and functioning properly and that aircraft Y had all of its lights on except for landing lights.

Original NASA ASRS Text

Title: CE750 FLT CREW ABORTS TKOF AFTER SIGHTING B737 ABOUT TO CROSS THE RWY AT MDW.

Narrative: CLRED FOR TKOF RWY 31C AT MDW. AS WE BEGAN TO ROLL, NOTICED B737 TAXIING AT VERY HIGH SPD FROM L TO R. IT WAS OBVIOUS HE WAS GOING TO CROSS OUR RWY APPROX 150 YARDS FROM DEP END. PF ABORTED TKOF AT THE SAME TIME AS TWR CTLR SAID 'STOP, STOP, STOP!' B737 CONTINUED ACROSS RWY WITHOUT SLOWING DOWN. WE BOTH SAW THIS COMING AND GOT THE AIRPLANE STOPPED WELL SHORT OF THE INTXN. CALLED TWR ON PHONE AFTER TRIP. HE CLAIMED TWR CANCELED OUR TKOF CLRNC IMMEDIATELY AFTER GIVING IT. I AM SPECULATING THAT I WAS ANSWERING TKOF CLRNC ON THE RADIO AT THE SAME TIME HE WAS CANCELING, SO WE BLOCKED EACH OTHER. B737 WAS PROBABLY ON GND CTL AND HEARD NOTHING. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT HE WAS CLRED INTO POS AND HOLD AND SUBSEQUENTLY CLRED FOR TKOF. RPTR STATED THAT ACFT Y WAS XING IN THE AREA OF TXWY A AND TXWY B AND THAT HIS ACFT BARELY GOT ROLLING AND STOPPED PRIOR TO THE TXWY K INTXN. RPTR STATED THAT IN THE TELEPHONE CONVERSATION WITH THE TWR CTLR, THE CTLR DID NOT MENTION HAVING CHKED THE TWR TAPES. RPTR STATED THAT ALL OF HIS ACFT'S LIGHTS WERE ON AND FUNCTIONING PROPERLY AND THAT ACFT Y HAD ALL OF ITS LIGHTS ON EXCEPT FOR LNDG LIGHTS.

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.