B737 first officer reported they experienced a sudden and aggressive yaw during the takeoff roll on ...

Attributes
ACN	1472244
Time
Date	201708
Local Time Of Day	0601-1200
Place
Locale Reference	ORD.Airport
State Reference	IL
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B737 Next Generation Undifferentiated
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Aircraft 2
Make Model Name	A321
Flight Phase	Final Approach
Flight Plan	IFR
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Type 938
Person 2
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Type 1618
Events
Anomaly	Conflict Ground Conflict Less Severe

Narrative:

We were departing runway 22L in ord. At the time ord was landing runway 28C. Just prior to our takeoff an A321 was landing runway 28C which crosses over runway 22L's takeoff roll path. At approximately 120-130 kts our aircraft suddenly and aggressively yawed right. This occurred prior to V1 but in the high speed regime. As pilot monitoring I double checked the engine and flight control indications. Everything was normal so I did not make a call out. The captain (pilot flying) was able to return the aircraft to runway centerline and took off normally without any further issues.the winds during takeoff were reported 300 degrees at 8 kts. I believe that we encountered jet blast or wake from the aircraft landing runway 28C.

Original NASA ASRS Text

Title: B737 First Officer reported they experienced a sudden and aggressive yaw during the takeoff roll on ORD Runway 22L when an A321 crossed overhead landing on Runway 28C.

Narrative: We were departing Runway 22L in ORD. At the time ORD was landing Runway 28C. Just prior to our takeoff an A321 was landing Runway 28C which crosses over Runway 22L's takeoff roll path. At approximately 120-130 kts our aircraft suddenly and aggressively yawed right. This occurred prior to V1 but in the high speed regime. As pilot monitoring I double checked the engine and flight control indications. Everything was normal so I did not make a call out. The Captain (pilot flying) was able to return the aircraft to runway centerline and took off normally without any further issues.The winds during takeoff were reported 300 degrees at 8 kts. I believe that we encountered jet blast or wake from the aircraft landing Runway 28C.

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.

B737 first officer reported they experienced a sudden and aggressive yaw during the takeoff roll on ord runway 22L when an A321 crossed overhead landing on runway 28C.