# NTSB DEN91LA122: Stinson 108, N40159, Steamboat Sprin, CO, September 2, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 2, 1991, 09:15 local (15:15 UTC)
- Place: Steamboat Sprin, CO
- Coordinates: 40.47071, -106.819046 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.4707&lon=-106.8190&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 3, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 18130
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN91LA122
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/18130/pdf
- Page: https://openairdocs.org/ntsb/DEN91LA122

## Probable cause

A SWERVE INITIATED BY THE PILOT IN COMMAND TO AVOID A COLLISION WITH A DEER DURING TAKEOFF ROLL.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Abrupt maneuver, takeoff - roll/run
  - object - animal(s) (cause)
  - remedial action - attempted, pilot in command (cause)
- Nose over, takeoff - aborted

## Analysis

DURING TAKEOFF ROLL, JUST AFTER THE TAIL CAME UP, THE PILOT SAW A DEER ON THE RUNWAY.  EVASIVE ACTION WAS TAKEN AND THE AIRCRAFT DEPARTED THE SIDE OF THE RUNWAY AND OVERTURNED.

## Aircraft

- Registration: [N40159](https://openairdocs.org/aircraft/N40159), registered now, S/N 108-89, built 1946 (OpenAirDocs)
- Reported make and model: STINSON 108
- Registry model: [Stinson 108](https://openairdocs.org/model/stinson-108) (registry code 9230402) (OpenAirDocs)
- Registry engine: [Franklin 6A4150 series](https://openairdocs.org/engine/franklin-6a4150-series) (registry code 27024, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 8
- Engines: FRANKLIN 6AH-150-B3 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Carol J. Leyner
- Registered owner: Carol J. Leyner
- Airport: SBS, Steamboat Springs, runway 32, 3,655 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 49; private; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; flight hours: 259 total, 78 in this make and model, 259 as pilot in command, 25 in the last 90 days, 1 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 30 statute miles
- Temperature: -0 °F, dew point -0 °F

## 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 19910902065889A](https://openairdocs.org/incident/19910902065889A), Sep 2, 1991: Univar 108, Steamboat Spgs, CO, Substantial damage. Swerved and tried to abort takeoff to avoid a deer on runway. Side load caused tire to come off causing nose over.

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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