# NTSB DEN86LA111: Cessna 170B, N2436D, St George, UT, April 8, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 8, 1986, 13:45 local (20:45 UTC)
- Place: St George, UT
- Coordinates: 37.179977, -113.599082 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.1800&lon=-113.5991&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16946
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN86LA111
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16946/pdf
- Page: https://openairdocs.org/ntsb/DEN86LA111

## Sequence of events

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

- On ground/water encounter with weather, landing - flare/touchdown
  - weather condition - crosswind (contributing factor)
  - compensation for wind conditions - inadequate, pilot in command (cause)
- Loss of control - on ground/water, landing - flare/touchdown
  - ground loop/swerve - inadvertent, pilot in command (cause)
  - directional control - not maintained, pilot in command (cause)

## Analysis

THE PLT STATED THE ACFT ENCOUNTERED A CROSSWIND AND GROUND LOOPED DURING THE LANDING TOUCHDOWN.

## Aircraft

- Registration: [N2436D](https://openairdocs.org/aircraft/N2436D), registered now, S/N 20588 (OpenAirDocs)
- Reported make and model: CESSNA 170B
- Registry model: [Cessna 170B](https://openairdocs.org/model/cessna-170b) (registry code 2072306) (OpenAirDocs)
- Registry engine: [Continental C145 series](https://openairdocs.org/engine/continental-c145-series) (registry code 17012, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 20588
- Airframe hours: 2879
- Engines: CONTINENTAL C-145 145 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Allan E. Muchmore
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, March 8, 1986, 10 hours before
- Departed: 1L7, ESCALANTE, UT
- Airport: SGU, St. George Municipal, runway 34, 6,100 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 44; private; airplane ratings: single-engine land, single-engine sea; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 401 total, 201 in this make and model, 326 as pilot in command, 19 in the last 90 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 12 knots, gusting 20
- Visibility: 100 statute miles
- Lowest ceiling: none
- Temperature: 64 °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 19860408087569A](https://openairdocs.org/incident/19860408087569A), Apr 8, 1986: Cessna 170B, Saint George, UT, Substantial damage. Ground looped on landing in a gusting crosswind exceeding the maximum demonstrated crosswind component of aircraft.

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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