# NTSB CEN13CA284: Stinson 108-1, N8931K, Cambridge, MN, May 17, 2013

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Data collection · Final report
- Date: May 17, 2013, 08:10 local (13:10 UTC)
- Place: Cambridge, MN
- Coordinates: 45.556945, -93.26361 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.5569&lon=-93.2636&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Defining event: [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report July 29, 2013
- Report: Approved by Office Director
- NTSB office: Central Region
- Parties: Federal Aviation Administration
- NTSB case key (mKey): 86936
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN13CA284
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/86936/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=86936
- Page: https://openairdocs.org/ntsb/CEN13CA284

## Probable cause

The pilot’s loss of directional control while landing with a gusting crosswind.

## Findings

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

- [Action: incorrect action performance](https://openairdocs.org/ntsb-findings/02041015): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Stinson 108-1, 1 case](https://openairdocs.org/ntsb-findings/02041015/cases.md?model=9230404), [All aircraft, 1,386 cases](https://openairdocs.org/ntsb-findings/02041015/cases.md)
- [Wind: gusts](https://openairdocs.org/ntsb-findings/03034045): Environmental issues › Conditions/weather/phenomena · Effect on equipment; cases with it: [Stinson 108-1, 4 cases](https://openairdocs.org/ntsb-findings/03034045/cases.md?model=9230404), [All aircraft, 1,199 cases](https://openairdocs.org/ntsb-findings/03034045/cases.md)

## Sequence of events

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

- [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Stinson 108-1, 13 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=9230404), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md)
- [Landing-landing roll: Runway excursion](https://openairdocs.org/ntsb-events/300); cases with it: [Stinson 108-1, 6 cases](https://openairdocs.org/ntsb-events/300/sequence.md?model=9230404), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md)

## Analysis

The pilot stated that after touchdown on the runway, an unexpected gusting crosswind turned the nose of the airplane to the left. The airplane ground looped and went off the east side of the runway, during which the left wing and firewall were substantially damaged. The pilot stated that there were no preaccident mechanical malfunctions or failures with the airplane.

## Factual narrative

The pilot stated that after touchdown on the runway, an unexpected gusting crosswind turned the nose of the airplane to the left. The airplane ground looped and went off the east side of the runway, during which the left wing and firewall were substantially damaged. The pilot stated that there were no preaccident mechanical malfunctions or failures with the airplane.

## Aircraft

- Registration: [N8931K](https://openairdocs.org/aircraft/N8931K), registered now, S/N 108-1931, built 1947 (OpenAirDocs)
- Reported make and model: STINSON 108-1
- Registry model: [Stinson 108-1](https://openairdocs.org/model/stinson-108-1) (registry code 9230404) (OpenAirDocs)
- Registry engine: [Franklin 6A4150 series](https://openairdocs.org/engine/franklin-6a4150-series) (registry code 27024, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 108-1931
- Engines: FRANKLIN 6A4150 SERIES 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Danial Stewart
- Registered owner: Danial Stewart
- Airworthiness certificate: Standard, Normal
- Departed: MDZ, Medford, WI
- Destination: CBG, Cambridge, MN
- Airport: KCBG, Cambridge Regional Airport, runway 16C, 4,001 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 62; injuries: none; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review February 6, 2013; seat: left; flight hours: 523 total, 2 in this make and model, 338 as pilot in command, 11 in the last 90 days, 3 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 110° at 5 knots, gusting 10
- Visibility: 10 statute miles
- Lowest ceiling: 8,700 ft broken
- Temperature: 57 °F, dew point 28 °F
- Altimeter: 30.10 inHg
- Observed at: PNM, 15 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 20130517006849A](https://openairdocs.org/incident/20130517006849A), May 17, 2013: Stinson 108-1, Cambridge, MN, Substantial damage. After landing on runway 16 at Cambridge, MN (cbg), the pilot lost directional control and departed the left side of runway, struck left wing tip on the ground…

## Docket (2 files)

The files NTSB released with the investigation on July 19, 2013, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=86936. 1.6 MB in all.

- Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 1.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40393293&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF
- Pilot Record of Conversation (item 2, .PDF, 192 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40394036&FileExtension=.PDF&FileName=Pilot%20Record%20of%20Conversation-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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.