# NTSB WPR14CA082: Cubcrafters CC11-160, N924JS, Roberts, MT, December 29, 2013

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Data collection · Final report
- Date: December 29, 2013, 12:30 local (19:30 UTC)
- Place: Roberts, MT
- Coordinates: 45.443332, -109.241668 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.4433&lon=-109.2417&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Defining event: [Taxi: Roll over](https://openairdocs.org/ntsb-events/097)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report April 1, 2014
- Report: Approved by Office Director
- NTSB office: Western Pacific Region
- Parties: Federal Aviation Administration
- NTSB case key (mKey): 88607
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR14CA082
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/88607/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=88607
- Page: https://openairdocs.org/ntsb/WPR14CA082

## Probable cause

The pilot's selection of unsuitable terrain during taxi, which resulted in a loss of directional control.

## Findings

NTSB's coded findings; those marked are part of the probable cause.

- [Use of equip/info: use of equip/system](https://openairdocs.org/ntsb-findings/02063015): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Cubcrafters CC11-160, 2 cases](https://openairdocs.org/ntsb-findings/02063015/cases.md?model=060006N), [All aircraft, 1,391 cases](https://openairdocs.org/ntsb-findings/02063015/cases.md)
- [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Cubcrafters CC11-160, 14 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=060006N), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md)
- [Terrain: snowy/icy terrain](https://openairdocs.org/ntsb-findings/03021030): Environmental issues › Physical environment · Contributed to outcome; cases with it: [Cubcrafters CC11-160, 1 case](https://openairdocs.org/ntsb-findings/03021030/cases.md?model=060006N), [All aircraft, 77 cases](https://openairdocs.org/ntsb-findings/03021030/cases.md)

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Taxi: Roll over](https://openairdocs.org/ntsb-events/097) (defining event); cases with it: [Cubcrafters CC11-160, 1 case](https://openairdocs.org/ntsb-events/097/sequence.md?model=060006N), [All aircraft, 261 cases](https://openairdocs.org/ntsb-events/097/sequence.md)

## Analysis

The pilot reported that he landed at a private snow covered airstrip. After landing, while taxiing to parking, the right main landing gear broke through the snow crust and the airplane flipped inverted, which substantially damaged the vertical stabilizer. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.

## Factual narrative

The pilot reported that he landed at a private snow covered airstrip. After landing, while taxiing to parking, the right main landing gear broke through the snow crust and the airplane flipped inverted, which substantially damaged the vertical stabilizer. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.

## Aircraft

- Registration: [N924JS](https://openairdocs.org/aircraft/N924JS), registered now, S/N CC11-00253, built 2013 (OpenAirDocs)
- Reported make and model: CUBCRAFTERS INC CC11-160
- Registry model: [Cubcrafters CC11-160](https://openairdocs.org/model/cubcrafters-cc11-160) (registry code 060006N) (OpenAirDocs)
- Registry engine: [Cubcrafter CC340](https://openairdocs.org/engine/cubcrafter-cc340) (registry code 18050, 4 cycle) (OpenAirDocs)
- Category: Airplane
- Serial number: CC11-00253
- Year built: 2013
- Airframe hours: 100
- Engines: Lycoming CC340 180 horsepower reciprocating
- Damage: Substantial damage
- Fire: Unknown
- Flight: Personal, Part 91
- Airworthiness certificate: Special, Experimental light sport (Special)
- Last inspection: Unknown, February 6, 2013, 100 hours before
- Departed: RED, Red Lodge, MT
- Destination: None, Roberts, MT
- Airport: None, Private

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 56; injuries: none; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 3, without waivers/limitations; last flight review August 8, 2013; seat: center; restraint: 4-point; flight hours: 5,100 total, 100 in this make and model, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 30 °F, dew point 16 °F
- Altimeter: 29.96 inHg
- Observed at: BIL, 36 nm away

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 20131229023859A](https://openairdocs.org/incident/20131229023859A), Dec 29, 2013: Cubcrafters Inc CC11-160, Red Lodge, MT, Substantial damage. On December 29, 2013, at 1230 MST, a Cubcrafters CC11-160, N924JS, registered to a LLC, fliped after RH gear fell through the snow-packed field while taxing…

## Other investigations on N924JS (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB WPR13CA202](https://openairdocs.org/ntsb/WPR13CA202), Apr 19, 2013: CubCrafters CC11-160 (N924JS), Mesa, AZ, substantial damage. Probable cause: The pilot's failure to maintain directional control during the landing roll, which resulted in a ground loop.

## Docket (1 files)

The files NTSB released with the investigation on March 20, 2014, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=88607. 702 KB in all.

- Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 702 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40407097&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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