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Accident Report Detail

 
In-Flight Turbulence Encounter and Loss of Portions of the Elevators, China Airlines Flight C1-012 McDonnell Douglas MD-11-P Taiwan Registration B-150

Executive Summary

On December 7, 1992, about IO36 Coordhated Universal Time, a McDonnell Douglas MD-11, Taiwan registration B-150, China Airlines, flight CI-012, encountered moderate turbulence at flight level 330. The airplane subsequently departed controlled flight and sustained damage to the left and right outboard elevator skin assemblies, portions of which separated from the airplane.

The airplane was operating under the provisions of Title 14, Code of Federal Regulations, Part 129, as a scheduled passenger flight from Taipei, Taiwan, to Anchorage, Alaska. There were 246 passengers, 3 flightcrew members, 2 additional crewmembers, artd 14 cabincrew members on board, none of whom reported any injuries. The airplane continued on and landed uneventfully at Anchorage, Alaska.


Probable Cause

The National Transportation Safety Board determines that the probable cause of this incident was the light control force characteristics of the MD-11 airplane in high altitude cruise flight. The upset was induced by a moderate lateral gust and was exacerbated by excessive control deflections.

Contributing to the incident was a lack of pilot training specific to the recovery from high altitude, high speed upsets in the MD-11.


Accident Location:   ,   Japan about 20 Miles East of Japan
Accident Date: 12/7/1992
Accident ID: DCA93IA009

Date Adopted: 2/15/1994
NTSB Number: AAR-94-02
NTIS Number: PB94-910403

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