Emj flight crew encounters wake turbulence following an A320 on departure from ord.

Attributes
ACN	567385
Time
Date	200212
Day	Wed
Place
Locale Reference	airport : ord.airport
State Reference	IL
Aircraft 1
Controlling Facilities	tracon : c90.tracon
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 145 ER&LR
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : takeoff
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : c90.tracon
Operator	common carrier : air carrier
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	567385
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
ASRS Report	567677
Events
Anomaly	inflight encounter : wake turbulence non adherence : clearance other spatial deviation
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : took precautionary avoidance action
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	ATC Human Performance Environmental Factor Flight Crew Human Performance
Primary Problem	Environmental Factor

Narrative:

We departed runway 9L at ord with an A320 taking off before us with normal separation by ATC. We were assigned a 140 degree heading, and after becoming established, started to encounter repeated wake turbulence with up to 30 degree rolls, both left and right. Even as we continued to climb, the wake turbulence continued. I requested a 20 degree turn either left or right from ATC, and they told us they would be unable. Still encountering periods of wake turbulence, I told my first officer, who was PF, to take a 20 degree turn to the left after all. As soon as we started to turn, ATC then gave us a turn to a 220 degree heading. Turbulence from the wake could have been described as light to moderate.

Original NASA ASRS Text

Title: EMJ FLC ENCOUNTERS WAKE TURB FOLLOWING AN A320 ON DEP FROM ORD.

Narrative: WE DEPARTED RWY 9L AT ORD WITH AN A320 TAKING OFF BEFORE US WITH NORMAL SEPARATION BY ATC. WE WERE ASSIGNED A 140 DEG HDG, AND AFTER BECOMING ESTABLISHED, STARTED TO ENCOUNTER REPEATED WAKE TURB WITH UP TO 30 DEG ROLLS, BOTH L AND R. EVEN AS WE CONTINUED TO CLB, THE WAKE TURB CONTINUED. I REQUESTED A 20 DEG TURN EITHER L OR R FROM ATC, AND THEY TOLD US THEY WOULD BE UNABLE. STILL ENCOUNTERING PERIODS OF WAKE TURB, I TOLD MY FO, WHO WAS PF, TO TAKE A 20 DEG TURN TO THE L AFTER ALL. AS SOON AS WE STARTED TO TURN, ATC THEN GAVE US A TURN TO A 220 DEG HDG. TURB FROM THE WAKE COULD HAVE BEEN DESCRIBED AS LIGHT TO MODERATE.

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.