Pilot Debrief

BEECH 1900C near Sioux Falls, SD — 2018-04-30

Final reportCEN18LA164
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Date
2018-04-30
Location
Sioux Falls, SD, USA
Airport
FSD
Aircraft
BEECH 1900C
Registration
N172GA
Category
Airplane
Highest injury
None
Fatalities
0
Phase of flight
Taxi

Probable cause

Failure of the right main landing gear drag brace bolt for reasons that could not be determined based on the available information.

NTSB narrative

As the twin-engine, turbopropeller-equipped airplane started to taxi for takeoff, the right main landing gear collapsed, deforming the aft center wing lower spar cap. A postaccident examination of the airplane revealed that the right main landing gear drag brace bolt failed at the wing forward attach point. As the airplane moved forward, the strut pivoted aft, collapsing the landing gear. The drag brace bolt was not retained, and the reason for its failure could not be determined based on the available information.

Analysis

Primary failure mode
Mechanical failure
First missed decision gate
Inspection of landing gear components before taxi could have prevented failure.

NTSB coding

Evidence available

  • 3 docket documents
View NTSB final reportView NTSB docket

Docket documents3

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