# NTSB DEN84LA176: Cessna 150M, N8564U, Afton, WY, June 10, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 10, 1984, 10:30 local (16:30 UTC)
- Place: Afton, WY
- Coordinates: 42.720375, -110.92028 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.7204&lon=-110.9203&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16397
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN84LA176
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16397/pdf
- Page: https://openairdocs.org/ntsb/DEN84LA176

## Sequence of events

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

- In flight collision with terrain/water, takeoff
  - planning/decision - improper, pilot in command (cause)
  - weather condition - unfavorable wind (contributing factor)
  - weather condition - downdraft (contributing factor)
  - weather condition - turbulence (contributing factor)
  - weather condition - high density altitude (contributing factor)
  - altitude - not maintained, pilot in command (cause)

## Analysis

THE PLT DEPARTED RWY 16 WITH THE INTENTION OF REPOSITIONING THE ACFT ON THE ARPT AFTER LANDING. HE ESTIMATED THE SURFACEWINDS WERE FROM THE SOUTHEAST AT 15 KTS. A WITNESS STATED THAT THE WINDS HAD CHANGED DIRECTIONS ABOUT EIGHT TIMES DURING THE DAY. THE PLT STATED THAT AFTER CLIMBING TO ABOUT 400 FT, DOWNDRAFTS & VIOLENT TURBULENCE WERE ENCOUNTERED AND ALT COULD NOT BE MAINTAINED. THE ACFT SETTLED INTO A HAY FIELD WHERE IT NOSED OVER. AT THE TIME OF THE ACCIDENT, THE DENSITY ALT WAS ABOUT 6240 FT. THE ESTIMATED GROSS WEIGHT OF THE ACFT DURING TAKEOFF WAS 1537 LBS.

## Aircraft

- Registration: [N8564U](https://openairdocs.org/deregistered/N8564U-2013-05-14), registration cancelled 2013-05-14, S/N 15077948, built 1976 (OpenAirDocs)
- Reported make and model: CESSNA 150M
- Registry model: [Cessna 150M](https://openairdocs.org/model/cessna-150m) (registry code 2071830) (OpenAirDocs)
- Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 15077948
- Airframe hours: 2612
- Engines: CONTINENTAL O-200-A 100 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Registered owner: William Stone
- Airworthiness certificate: Standard, Utility
- Last inspection: 100 hour, February 5, 1984
- Airport: AFO, Afton Municipal, runway 16, 4,200 × 45 ft, dirt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 57; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 6,000 total, 300 in this make and model, 7 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 160° at 15 knots
- Visibility: 20 statute miles
- Temperature: 45 °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 19840610045049A](https://openairdocs.org/incident/19840610045049A), Jun 10, 1984: Cessna 150M, Afton, WY, Substantial damage. Unable to climb after liftoff. Landed off end of the runway and nosed over. Blamed variable winds and a downdraft.

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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