# NTSB ANC90LA087: Cessna 180, N7939V, Deshka River, AK, June 11, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 10, 1990, 18:15 local (Jun 11, 1990, 02:15 UTC)
- Place: Deshka River, AK
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 28, 1992
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5379
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC90LA087
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5379/pdf
- Page: https://openairdocs.org/ntsb/ANC90LA087

## Probable cause

THE PILOT-IN-COMMAND'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL.

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - directional control - not maintained, pilot in command (cause)
  - ground loop/swerve - inadvertent, pilot in command
- Nose over, landing - roll

## Analysis

AFTER TOUCHDOWN THE PILOT LOST DIRECTIONAL CONTROL OF THE AIRPLANE. THE AIRPLANE THEN NOSED OVER ON TO ITS BACK.

## Aircraft

- Registration: [N7939V](https://openairdocs.org/aircraft/N7939V), registered now, S/N 18051839, built 1967 (OpenAirDocs)
- Reported make and model: CESSNA 180
- Registry model: [Cessna 180H](https://openairdocs.org/model/cessna-180h) (registry code 2072618) (OpenAirDocs)
- Registry engine: [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series) (registry code 17026, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 18051839
- Engines: CONTINENTAL O-470-S 230 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: David Tredway
- Registered owner: David Tredway
- Airworthiness certificate: Standard, Normal
- Departed: ANC, ANCHORAGE, AK
- Airport: Silver Salmon, runway 9, 2,000 × 80 ft, dirt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 47; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; flight hours: 500 total, 400 in this make and model, 400 as pilot in command, 15 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 61 °F, dew point 39 °F
- Altimeter: 30.00 inHg

## 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 19900610019939A](https://openairdocs.org/incident/19900610019939A), Jun 10, 1990: Cessna 180H, Deshka River, AK, Substantial damage. Lost directional control after landing, tried to correct and aircraft nosed over.

## Other investigations on N7939V (3)

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 DEN99LA147](https://openairdocs.org/ntsb/DEN99LA147), Aug 14, 1999: Cessna 180H (N7939V), Gillette, WY, substantial damage. Probable cause: The pilot's inadvertent ground loop during landing roll.
- [NTSB ANC76AA031](https://openairdocs.org/ntsb/ANC76AA031), Sep 8, 1975: Cessna 180 (N7939V), Yakutat, AK, substantial damage
- [NTSB ANC67A0064](https://openairdocs.org/ntsb/ANC67A0064), Jun 19, 1967: Cessna 180H (N7939V), Yakutat, AK, substantial damage

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.