An aircraft reported severe wake turbulence.

Attributes
ACN	1346241
Time
Date	201604
Local Time Of Day	1201-1800
Place
Locale Reference	ZAU.ARTCC
State Reference	IL
Environment
Light	Daylight
Aircraft 1
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	Direct
Flight Plan	IFR
Aircraft 2
Make Model Name	PC-12
Flight Phase	Climb
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Enroute
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 22.0
Events
Anomaly	ATC Issue All Types Deviation - Procedural Published Material / Policy Inflight Event / Encounter Wake Vortex Encounter

Narrative:

Aircraft X was on the arrival and level at 15;000 feet. Aircraft Y was stopped short at 14;000 feet. The aircraft Y passed 5-6 miles behind aircraft X and reported severe turbulence; determined to be wake turbulence.[we need] better awareness of wake turbulence.

Original NASA ASRS Text

Title: An aircraft reported severe wake turbulence.

Narrative: Aircraft X was on the arrival and level at 15;000 feet. Aircraft Y was stopped short at 14;000 feet. The Aircraft Y passed 5-6 miles behind Aircraft X and reported severe turbulence; determined to be wake turbulence.[We need] better awareness of wake turbulence.

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.