A319 captain reported rejecting the takeoff on ord runway 22L at approximately 85 kts after encounte...

Narrative:

Planned departure on runway 22L; winds 220/7. Normal run up for takeoff; first officer called 'thrust set'. At approximately 85 knots we felt a swerve to the right; it was significant enough that I thought we may have lost an engine. I called 'reject' and brought the throttles to idle. Max brakes engaged and we decelerated quickly. I disconnected autobrakes and slowed the aircraft to taxi speed. There was no ECAM and all engine indications were normal. We didn't suspect that we had a blown tire. The uncommanded swerve was significant enough that I wanted maintenance to look at the aircraft. We taxied back to the gate. We were given another aircraft. We taxied to runway 22L for departure. We began a normal takeoff roll; winds 220/7 and at almost the same location we had a slight swerve to the right rolled by a swerve to the left. Wasn't nearly as significant as our aborted takeoff but noticeable. After discussing the events we both concluded that there was a possibility that we hit wake turbulence on takeoff from aircraft landing on 28C. I've taken off runway 22L many times and have never experienced that.

Original NASA ASRS Text

Title: A319 Captain reported rejecting the takeoff on ORD Runway 22L at approximately 85 kts after encountering probable wake turbulence from aircraft landing on 28C.

Narrative: Planned departure on Runway 22L; winds 220/7. Normal run up for takeoff; First Officer called 'thrust set'. At approximately 85 knots we felt a swerve to the right; it was significant enough that I thought we may have lost an engine. I called 'reject' and brought the throttles to idle. Max brakes engaged and we decelerated quickly. I disconnected autobrakes and slowed the aircraft to taxi speed. There was no ECAM and all engine indications were normal. We didn't suspect that we had a blown tire. The uncommanded swerve was significant enough that I wanted maintenance to look at the aircraft. We taxied back to the gate. We were given another aircraft. We taxied to Runway 22L for departure. We began a normal takeoff roll; winds 220/7 and at almost the same location we had a slight swerve to the right rolled by a swerve to the left. Wasn't nearly as significant as our aborted takeoff but noticeable. After discussing the events we both concluded that there was a possibility that we hit wake turbulence on takeoff from aircraft landing on 28C. I've taken off Runway 22L many times and have never experienced that.

Data retrieved from NASA's ASRS site 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.

Attributes
ACN	1646499
Time
Date	201905
Local Time Of Day	1201-1800
Place
Locale Reference	ORD.Airport
State Reference	IL
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	Landing
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 137 Flight Crew Type 821
Events
Anomaly	Inflight Event / Encounter Wake Vortex Encounter

A319 captain reported rejecting the takeoff on ord runway 22L at approximately 85 kts after encountering probable wake turbulence from aircraft landing on 28C.