Narrative:
The right main landing gear drag brace on a Beech 1900C airplane, N172GA, disconnected from the wing forward attach point, the strut pivoted aft, and the landing gear collapsed as the airplane started to taxi for takeoff at Sioux Falls-Joe Foss Field (FSD), South Dakota, USA. The pilot was not injured. The airplane was substantially damaged.
Post-accident examination of the airplane revealed the aft spar lower spar cap had sustained damage from the gear collapse. The cap was dented and deformed up to 0.090". Pitting corrosion was also found on the spar cap.
PROBABLE CAUSE: "Failure of the right main landing gear drag brace bolt for reasons that could not be determined based on the available information."
Damaged on the ground
| Status: | Accident investigation report completed and information captured |
| Date: | Sunday 29 April 2018 |
| Time: | 22:30 |
| Type: |  Beechcraft 1900C |
| Operator: | Alpine Aviation |
| Registration: | N172GA |
| MSN: | UB-11 |
| First flight: | 1984 |
| Total airframe hrs: | 41851 |
| Engines: | 2 Pratt & Whitney Canada PT6A-65B |
| Crew: | Fatalities: 0 / Occupants: 1 |
| Passengers: | Fatalities: 0 / Occupants: 0 |
| Total: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Aircraft fate: | Repaired |
| Location: | Sioux Falls Regional Airport (Jo Foss Field), SD (FSD) ( United States of America)
|
| Phase: | Taxi (TXI) |
| Nature: | Cargo |
| Departure airport: | Sioux Falls Regional Airport (Joe Foss Field), SD (FSD/KFSD), United States of America |
| Rapid City Regional Airport, SD (RAP/KRAP), United States of America |
The right main landing gear drag brace on a Beech 1900C airplane, N172GA, disconnected from the wing forward attach point, the strut pivoted aft, and the landing gear collapsed as the airplane started to taxi for takeoff at Sioux Falls-Joe Foss Field (FSD), South Dakota, USA. The pilot was not injured. The airplane was substantially damaged.
Post-accident examination of the airplane revealed the aft spar lower spar cap had sustained damage from the gear collapse. The cap was dented and deformed up to 0.090". Pitting corrosion was also found on the spar cap.
Probable Cause:
PROBABLE CAUSE: "Failure of the right main landing gear drag brace bolt for reasons that could not be determined based on the available information."
Accident investigation:
 |
|
Classification:
Landing gear collapseDamaged on the ground
Sources:
» NTSBPhotos
Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Sioux Falls Regional Airport (Joe Foss Field), SD to Rapid City Regional Airport, SD as the crow flies is 506 km (316 miles).
Accident location: Exact; as reported in the official accident report.
Distance from Sioux Falls Regional Airport (Joe Foss Field), SD to Rapid City Regional Airport, SD as the crow flies is 506 km (316 miles).
Accident location: Exact; as reported in the official accident report.
This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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