Narrative:

Aircraft was pushed back from ord with tail south. Departure runway was runway 32L which required a double-back on taxiway B to get to runway. Taxiway B was being used to feed departures to runway 4L so traffic conflicts existed. Ground control cleared flight to taxi to runway 32L via taxiway a-c-B and then back to alpha to runway 32L via taxiway A9. The 180 degree turn from taxiway a to taxiway C to taxiway B required our right wing to violate the clrway for ord runway 9L. As we completed our turn, it appeared that an rj aircraft on runway 9L was given takeoff clearance. We sped up to quickly remove our wingtip from the runway zone and there was no problem with aircraft separation as the takeoff aircraft had not appeared to move. It was disconcerting to us since we knew our wing would be over the runway clear line and we were not on tower frequency to determine the departing aircraft's actual clearance. We expedited our turn to minimize exposure. Ground control could have avoided the conflict by clearing us to double back via taxiway right rather than taxiway C. No human factors in cockpit. We were all fresh and awake. There did seem to be some impatience in toe of control from ground. Ultimately, outcome was non event, but could have been more complicated given other circumstances. 'Uncomfortable' situation for crew.

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Original NASA ASRS Text

Title: THE WINGTIP OF A B777 HANGS OVER RWY 9L AT ORD DURING THE TURN FROM TXWY A TO TXWY C TO TXWY B.

Narrative: ACFT WAS PUSHED BACK FROM ORD WITH TAIL S. DEP RWY WAS RWY 32L WHICH REQUIRED A DOUBLE-BACK ON TXWY B TO GET TO RWY. TXWY B WAS BEING USED TO FEED DEPS TO RWY 4L SO TFC CONFLICTS EXISTED. GND CTL CLRED FLT TO TAXI TO RWY 32L VIA TXWY A-C-B AND THEN BACK TO ALPHA TO RWY 32L VIA TXWY A9. THE 180 DEG TURN FROM TXWY A TO TXWY C TO TXWY B REQUIRED OUR R WING TO VIOLATE THE CLRWAY FOR ORD RWY 9L. AS WE COMPLETED OUR TURN, IT APPEARED THAT AN RJ ACFT ON RWY 9L WAS GIVEN TKOF CLRNC. WE SPED UP TO QUICKLY REMOVE OUR WINGTIP FROM THE RWY ZONE AND THERE WAS NO PROB WITH ACFT SEPARATION AS THE TKOF ACFT HAD NOT APPEARED TO MOVE. IT WAS DISCONCERTING TO US SINCE WE KNEW OUR WING WOULD BE OVER THE RWY CLR LINE AND WE WERE NOT ON TWR FREQ TO DETERMINE THE DEPARTING ACFT'S ACTUAL CLRNC. WE EXPEDITED OUR TURN TO MINIMIZE EXPOSURE. GND CTL COULD HAVE AVOIDED THE CONFLICT BY CLRING US TO DOUBLE BACK VIA TXWY R RATHER THAN TXWY C. NO HUMAN FACTORS IN COCKPIT. WE WERE ALL FRESH AND AWAKE. THERE DID SEEM TO BE SOME IMPATIENCE IN TOE OF CTL FROM GND. ULTIMATELY, OUTCOME WAS NON EVENT, BUT COULD HAVE BEEN MORE COMPLICATED GIVEN OTHER CIRCUMSTANCES. 'UNCOMFORTABLE' SIT FOR CREW.

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.