Narrative:

Aircraft weight 227000 pounds, captain performing the takeoff. B757 IFR flight ont-sdf cleared 'position and hold for traffic crossing downfield.' traffic was B757, DC8, B747. When the B747 cleared, flight was 'caution jet blast, cleared for takeoff.' clearance acknowledged, and captain began takeoff roll. At about 125 KTS, first officer noticed airspeed stagnation, with speed. Dropping to about 123 KTS. About this time, captain noticed a yaw to the right causing the aircraft to veer off centerline. Captain corrected back and the aircraft continued across centerline. The airspeed then began to increase. During the time the aircraft 'drifted' left, the captain called for, and performed the reject. The first officer informed the tower and the flight was cleared to taxi back to ramp. Maintenance was informed and a write-up in the logbook was made. Maintenance performed an inspection of the brakes and tires. Reject was discussed, items covered were: locked brake, then a release/engine failure or hesitation/jet blast from crossing traffic. Maintenance found no evidence of locked brake and cleared the write-up. If it was an engine hesitation, it was transitory. If it was jet blast, the B747 had to be at a very high thrust. Crew was expecting 'jet blast' but such a large amount, if it was jet blast, was very unexpected. All persons involved performed as trained. The tower asked if we needed the equipment. (Told no.) the first officer checked the reject speeds/called the tower/backed up the captain. The rejected takeoff equipment on the aircraft performed excellent. The flight continued on to sdf without incident.

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Original NASA ASRS Text

Title: FLC OF A B757 ABORTED TKOF AFTER THE CAPT EXPERIENCED AN UNCONTROLLABLE YAW AND HESITATION OF AN AIRSPD INCREASE. MAINT CHK REVEALED NO BRAKE OR ENG SYS PROBS. JET BLAST FROM A B747 WAS SUSPECTED OF CAUSING THE PROB SINCE THE SUBSEQUENT TKOF WAS UNEVENTFUL.

Narrative: ACFT WT 227000 LBS, CAPT PERFORMING THE TKOF. B757 IFR FLT ONT-SDF CLRED 'POS AND HOLD FOR TFC XING DOWNFIELD.' TFC WAS B757, DC8, B747. WHEN THE B747 CLRED, FLT WAS 'CAUTION JET BLAST, CLRED FOR TKOF.' CLRNC ACKNOWLEDGED, AND CAPT BEGAN TKOF ROLL. AT ABOUT 125 KTS, FO NOTICED AIRSPD STAGNATION, WITH SPD. DROPPING TO ABOUT 123 KTS. ABOUT THIS TIME, CAPT NOTICED A YAW TO THE R CAUSING THE ACFT TO VEER OFF CTRLINE. CAPT CORRECTED BACK AND THE ACFT CONTINUED ACROSS CTRLINE. THE AIRSPD THEN BEGAN TO INCREASE. DURING THE TIME THE ACFT 'DRIFTED' L, THE CAPT CALLED FOR, AND PERFORMED THE REJECT. THE FO INFORMED THE TWR AND THE FLT WAS CLRED TO TAXI BACK TO RAMP. MAINT WAS INFORMED AND A WRITE-UP IN THE LOGBOOK WAS MADE. MAINT PERFORMED AN INSPECTION OF THE BRAKES AND TIRES. REJECT WAS DISCUSSED, ITEMS COVERED WERE: LOCKED BRAKE, THEN A RELEASE/ENG FAILURE OR HESITATION/JET BLAST FROM XING TFC. MAINT FOUND NO EVIDENCE OF LOCKED BRAKE AND CLRED THE WRITE-UP. IF IT WAS AN ENG HESITATION, IT WAS TRANSITORY. IF IT WAS JET BLAST, THE B747 HAD TO BE AT A VERY HIGH THRUST. CREW WAS EXPECTING 'JET BLAST' BUT SUCH A LARGE AMOUNT, IF IT WAS JET BLAST, WAS VERY UNEXPECTED. ALL PERSONS INVOLVED PERFORMED AS TRAINED. THE TWR ASKED IF WE NEEDED THE EQUIP. (TOLD NO.) THE FO CHKED THE REJECT SPDS/CALLED THE TWR/BACKED UP THE CAPT. THE RTO EQUIP ON THE ACFT PERFORMED EXCELLENT. THE FLT CONTINUED ON TO SDF WITHOUT INCIDENT.

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.