Incident Overview

Date: Tuesday 28 January 1997
Aircraft Type: McDonnell Douglas DC-9-51
Owner/operator: Trans Word Airlines (TWA)
Registration Number: N414EA
Location: Cape Girardeau, MO – ÿ United States of America
Phase of Flight: Unknown
Casualties: Fatalities: 0 / Occupants: 112
Component Affected: Flight data recorder dataFlight data recorder data
Investigating Agency: NTSBNTSB
Category: Accident
TWA Flight 374 experienced severe clear air turbulence over Cape Girardeau, resulting in injuries to two flight attendants and a broken clavicle. The flight data recorder showed significant changes in vertical acceleration, and a SIGMET issued for moderate occasional severe turbulence from FL240 to FL350 shortly before the turbulence onset. The flight was cleared to a lower altitude due to ‘bumpiness’.TWA Flight 374 experienced severe clear air turbulence over Cape Girardeau, resulting in injuries to two flight attendants and a broken clavicle. The flight data recorder showed significant changes in vertical acceleration, and a SIGMET issued for moderate occasional severe turbulence from FL240 to FL350 shortly before the turbulence onset. The flight was cleared to a lower altitude due to ‘bumpiness’.

Description

TWA Flight 374 encountered severe clear air turbulence over Cape Girardeau at FL220 during their initial descent into St. Louis. One flight attendant received a broken clavicle and another flight attendant received bruised ribs as a result of the turbulence. The flight data recorder data showed changes in vertical acceleration between 2.5g’s and -0.79g’s. A SIGMET for moderate occasional severe turbulence from FL240 to FL350 was issued just after the flight took off from New Orleans, LA. TWA 374 had just been cleared to a lower altitude as it was starting to get ‘bumpy’ when the severe turbulence was encountered. Probable Cause: clear air turbulence encountered by the flight.

Primary Cause

Clear air turbulence encountered by the flight.Clear air turbulence encountered by the flight.

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