Clear air turbulence causes flight attendant injury.

Attributes
ACN	298399
Time
Date	199503
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : tul
State Reference	OK
Altitude	msl bound lower : 33000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 12000
ASRS Report	298399
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	inflight encounter : weather other anomaly other
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : exited adverse environment
Consequence	other Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	other

Narrative:

Encountered abrupt clear air turbulence I classify as continuous moderate chop. We immediately reported the occurrence to ATC, obtained clearance to FL270 and executed a descent to FL270. Upon leaving FL280, the turbulence stopped as quickly as it had begun. The flight had been mostly smooth prior to this occurrence. 1 flight attendant suffered a blow to her head that caused us (after arrival at mci) to have her examined by airport paramedics and then admitted to a local hospital for examination and observation. It is my understanding that she was released later that evening.

Original NASA ASRS Text

Title: CLR AIR TURB CAUSES FLT ATTENDANT INJURY.

Narrative: ENCOUNTERED ABRUPT CLR AIR TURB I CLASSIFY AS CONTINUOUS MODERATE CHOP. WE IMMEDIATELY RPTED THE OCCURRENCE TO ATC, OBTAINED CLRNC TO FL270 AND EXECUTED A DSCNT TO FL270. UPON LEAVING FL280, THE TURB STOPPED AS QUICKLY AS IT HAD BEGUN. THE FLT HAD BEEN MOSTLY SMOOTH PRIOR TO THIS OCCURRENCE. 1 FLT ATTENDANT SUFFERED A BLOW TO HER HEAD THAT CAUSED US (AFTER ARR AT MCI) TO HAVE HER EXAMINED BY ARPT PARAMEDICS AND THEN ADMITTED TO A LCL HOSPITAL FOR EXAMINATION AND OBSERVATION. IT IS MY UNDERSTANDING THAT SHE WAS RELEASED LATER THAT EVENING.

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.