A falcon 2000EX first officer reported encountering wake vortex behind a B757 climbing through FL320...

Attributes
ACN	899438
Time
Date	201007
Local Time Of Day	0001-0600
Place
Locale Reference	ZAU.ARTCC
State Reference	IL
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Make Model Name	Falcon 2000
Operating Under FAR Part	Part 91
Flight Phase	Climb
Route In Use	Direct
Flight Plan	IFR
Aircraft 2
Make Model Name	B757 Undifferentiated or Other Model
Flight Phase	Climb
Flight Plan	IFR
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 100 Flight Crew Total 6000 Flight Crew Type 1000
Events
Anomaly	Inflight Event / Encounter Wake Vortex Encounter

Narrative:

Climbing out of the chicago area eastbound over michigan we were in clear air. Passing FL320 we encountered moderate to severe turbulence. We were at roughly n4218w8502 at mach 0.80 with the autopilot on. The turbulence lasted approximately 10 seconds and resulted in bank angles plus or minus 30 degrees. The auto pilot remained engaged; but the pilot flying was on the yoke using touch control steering. I reported the turbulence as moderate to chicago center and they said we were climbing behind a heavy 757 that was 10 NM in front of us. The wind at the time was from behind us at approximately 55 knots.

Original NASA ASRS Text

Title: A Falcon 2000EX First Officer reported encountering wake vortex behind a B757 climbing through FL320.

Narrative: Climbing out of the Chicago area eastbound over Michigan we were in clear air. Passing FL320 we encountered moderate to severe turbulence. We were at roughly N4218W8502 at Mach 0.80 with the autopilot on. The turbulence lasted approximately 10 seconds and resulted in bank angles plus or minus 30 degrees. The auto pilot remained engaged; but the pilot flying was on the yoke using touch control steering. I reported the turbulence as moderate to Chicago Center and they said we were climbing behind a heavy 757 that was 10 NM in front of us. The wind at the time was from behind us at approximately 55 knots.

Data retrieved from NASA's ASRS site as of April 2012 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.