A CL65 on the royko 3 RNAV to ord runway 27 encountered wake turbulence three times beginning at 110...

Attributes
ACN	824829
Time
Date	200902
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	Regional Jet CL65 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR ROYKO
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Commercial Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 240 Flight Crew Total 15000 Flight Crew Type 4800
Events
Anomaly	Deviation - Procedural Clearance Deviation - Speed All Types Inflight Event / Encounter Wake Vortex Encounter

Narrative:

On the royko 3 RNAV arrival and arriving in chicago O' hare international at 11000 ft while performing the in range checklist we encounter wake turbulence. We immediately reduced airspeed from 300 KTS to 250 KTS. The final approach controller then ask us 'what's your airspeed.' we reply 250 KTS and then increase airspeed back to 300 KTS. The controller then ask us to descend from 11000 ft to 7000 ft and join the runway 27L localizer. During the descent phase to 7000 ft we encounter a second wake turbulence and disconnect the autopilot for directional control of the aircraft. The controller's frequency becomes saturated. We encounter a third wake turbulence while hand flying the aircraft on the ILS runway 27L. When the controller finally returns back to our flight and tells us 'cleared for the approach and to contact tower at taffs' the first officer shares with him on the radio the encounter of wake turbulence 3 times. Upon landing the 2 flight attendants working this flight indicate they lost their balance while performing their cabin duties.

Original NASA ASRS Text

Title: A CL65 on the ROYKO 3 RNAV to ORD Runway 27 encountered wake turbulence three times beginning at 11000 FT. Flight attendants lost balance but were uninjured during the events.

Narrative: On the ROYKO 3 RNAV arrival and arriving in Chicago O' Hare International at 11000 FT while performing the In Range Checklist we encounter wake turbulence. We immediately reduced airspeed from 300 KTS to 250 KTS. The final approach controller then ask us 'What's your airspeed.' We reply 250 KTS and then increase airspeed back to 300 KTS. The controller then ask us to descend from 11000 FT to 7000 FT and join the Runway 27L Localizer. During the descent phase to 7000 FT we encounter a second wake turbulence and disconnect the autopilot for directional control of the aircraft. The controller's frequency becomes saturated. We encounter a third wake turbulence while hand flying the aircraft on the ILS Runway 27L. When the controller finally returns back to our flight and tells us 'cleared for the approach and to contact tower at TAFFS' the First Officer shares with him on the radio the encounter of wake turbulence 3 times. Upon landing the 2 Flight Attendants working this flight indicate they lost their balance while performing their cabin duties.

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.

A CL65 on the royko 3 RNAV to ord runway 27 encountered wake turbulence three times beginning at 11000 ft. Flight attendants lost balance but were uninjured during the events.