In-flight encounter with moderate to severe turbulence injures 2 cabin attendant and one passenger.

Attributes
ACN	200556
Time
Date	199201
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : dln
State Reference	MT
Altitude	msl bound lower : 33000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zlc
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer observation : company check pilot oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 30000 flight time type : 4000
ASRS Report	200556
Person 2
Affiliation	company : air carrier
Function	flight crew : captain instruction : trainee
Qualification	pilot : commercial pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 130 flight time total : 16000 flight time type : 5
ASRS Report	200553
Events
Anomaly	inflight encounter other non adherence : published procedure other anomaly other
Independent Detector	other flight crewa other other : unspecified
Resolutory Action	none taken : unable
Consequence	other
Supplementary
Primary Problem	Weather
Air Traffic Incident	Pilot Deviation other

Narrative:

Encounted moderate/severe turbulence in cruise flight. Seat belt sign 'on.' 2 flight attendants and one passenger injured. Turbulence lasted approximately 45 seconds slowed aircraft to 290 KTS. Used control wheel steering selection on automatic pilot. Requested paramedics meet aircraft upon arrival act slc. No visual clues prior to encounter. Approximately 30 seconds earlier heard aircraft report moderate turbulence FL410. We leveled off at FL330 en route - our flight plan altitude was FL410. Would be helpful if something/someone could advise us of C.a.T. Maybe when we check in with ATC, previous aircraft could advise turbulence conditions.

Original NASA ASRS Text

Title: INFLT ENCOUNTER WITH MODERATE TO SEVERE TURB INJURES 2 CAB AND ONE PAX.

Narrative: ENCOUNTED MODERATE/SEVERE TURB IN CRUISE FLT. SEAT BELT SIGN 'ON.' 2 FLT ATTENDANTS AND ONE PAX INJURED. TURB LASTED APPROX 45 SECONDS SLOWED ACFT TO 290 KTS. USED CTL WHEEL STEERING SELECTION ON AUTO PLT. REQUESTED PARAMEDICS MEET ACFT UPON ARR ACT SLC. NO VISUAL CLUES PRIOR TO ENCOUNTER. APPROX 30 SECONDS EARLIER HEARD ACFT RPT MODERATE TURB FL410. WE LEVELED OFF AT FL330 ENRTE - OUR FLT PLAN ALT WAS FL410. WOULD BE HELPFUL IF SOMETHING/SOMEONE COULD ADVISE US OF C.A.T. MAYBE WHEN WE CHK IN WITH ATC, PREVIOUS ACFT COULD ADVISE TURB CONDITIONS.

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.