Aviation Accident Summaries

Aviation Accident Summary CHI91IA175

KANSAS CITY, MO, USA

Aircraft #1

N933ML

DOUGLAS DC-9-32

Analysis

THE INCIDENT AIRPLANE ENCOUNTERED CLEAR AIR TURBULENCE WHILE FLYING IN VISUAL METEOROLOGICAL CONDITIONS AT 10,000' MSL. THE AIRPLANE WAS NOT DAMAGED DURING THE ENCOUNTER AND THE SEAT BELT SIGN WAS ON. SHORTLY AFTER THE ENCOUNTER THE CAPTAIN WAS ADVISED BY THE CABIN CREW THAT THERE HAD BEEN INJURIES IN THE CABIN DURING THE TURBULENCE. THE FLIGHT CONTINUED TO ITS DESTINATION WHERE IT WAS MET BY PARAMEDICS. SIX PERSONS, THREE FLIGHT ATTENDANTS AND THREE PASSENGERS, WERE TRANSPORTED TO A LOCAL HOSPITAL, TREATED FOR MINOR INJURIES AND RELEASED. ONE PASSENGER SEAT BELT SEPARATED FROM ITS ATTACHMENT POINT ON THE SEAT FRAME. EXAMINATION OF THE SEAT BELT SHOWED A DISTORTED KEEPER CLIP ON THE HOOK ASSEMBLY.

Probable Cause and Findings

INADEQUATE DESIGN BY THE MANUFACTURERS. FACTORS ASSOCIATED WITH THE INCIDENT ARE INADEQUATE CERTIFICATION/APPROVAL BY THE FEDERAL AVIATION ADMINISTRATION AND CLEAR AIR TURBULENCE.

 

Source: NTSB Aviation Accident Database

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