Medium large transport crew encountered moderate turbulence in ZAU class a airspace.

Attributes
ACN	499270
Time
Date	200101
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : fwa.vortac
State Reference	IN
Altitude	msl single value : 22000
Environment
Flight Conditions	VMC
Weather Elements	Turbulence
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau.artcc
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Operating Under FAR Part	Part 121
Navigation In Use	other other vortac
Flight Phase	cruise : level
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 3500
ASRS Report	499270
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
Events
Anomaly	inflight encounter : turbulence
Independent Detector	other flight crewa other flight crewb other other : 3
Resolutory Action	none taken : detected after the fact other
Consequence	other
Supplementary
Problem Areas	Weather
Primary Problem	Weather

Narrative:

We had 2 scheduled flts, ord-day-ord. Ord-day was uneventful with occasional very light chop. There were no PIREPS or sigmets for turbulence. Departure out of day was smooth all the way to FL220. We had been level in smooth air for a few mins at FL220. Suddenly, we encountered continuous moderate turbulence. I immediately made an announcement for the flight attendants to be seated. I also requested an altitude change. We received clearance to FL210, where it was once again smooth. This was clear air turbulence that was not forecasted. One flight attendant received a bruise on her knee. Another flight attendant received a thigh bruise. No passenger were hurt. Both flight attendants declined medical attention. I made PIREPS to ATC and our company.

Original NASA ASRS Text

Title: MLG CREW ENCOUNTERED MODERATE TURB IN ZAU CLASS A AIRSPACE.

Narrative: WE HAD 2 SCHEDULED FLTS, ORD-DAY-ORD. ORD-DAY WAS UNEVENTFUL WITH OCCASIONAL VERY LIGHT CHOP. THERE WERE NO PIREPS OR SIGMETS FOR TURB. DEP OUT OF DAY WAS SMOOTH ALL THE WAY TO FL220. WE HAD BEEN LEVEL IN SMOOTH AIR FOR A FEW MINS AT FL220. SUDDENLY, WE ENCOUNTERED CONTINUOUS MODERATE TURB. I IMMEDIATELY MADE AN ANNOUNCEMENT FOR THE FLT ATTENDANTS TO BE SEATED. I ALSO REQUESTED AN ALT CHANGE. WE RECEIVED CLRNC TO FL210, WHERE IT WAS ONCE AGAIN SMOOTH. THIS WAS CLR AIR TURB THAT WAS NOT FORECASTED. ONE FLT ATTENDANT RECEIVED A BRUISE ON HER KNEE. ANOTHER FLT ATTENDANT RECEIVED A THIGH BRUISE. NO PAX WERE HURT. BOTH FLT ATTENDANTS DECLINED MEDICAL ATTN. I MADE PIREPS TO ATC AND OUR COMPANY.

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.