Aviation Accident Summaries

Aviation Accident Summary CHI93IA060

SIOUX FALLS, SD, USA

Aircraft #1

N31SV

BEECH B90

Analysis

THE NIGHT POSITIONING FLIGHT WAS IN CRUISE FLIGHT AT 14,000 FEET WHEN THE MAIN CABIN DOOR SEPARATED FROM THE AIRPLANE. AN EXAMINATION OF THE DOOR REVEALED THAT THE DOOR LATCH MECHANISM WAS CAPABLE OF PROPER OPERATION WHEN SECURED PROPERLY. AN EXAMINATION OF THE ANNUNCIATOR DOOR WARNING LIGHT SYSTEM REVEALED THAT WHEN THE DIMMING RHEOSTAT WAS FULL DIM, THE 'DOOR OPEN' LIGHT WENT OUT. ONE OF THE TWO BULBS WAS BURNT OUT.

Probable Cause and Findings

THE PILOT-IN-COMMAND'S INADEQUATE PREFLIGHT.

 

Source: NTSB Aviation Accident Database

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