# NTSB ANC90LA012: Cessna 207, N6255H, Quinhagak, AK, November 7, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: November 7, 1989, 19:15 local (23:15 UTC)
- Place: Quinhagak, AK
- Location: 59.7551° N, 161.8454° W: Placed by OpenAirDocs at QUINHAGAK (AQH), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=59.7551&lon=-161.8454&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 7 uninjured
- Status: Completed, report September 5, 1991
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5322
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC90LA012
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5322/pdf
- Page: https://openairdocs.org/ntsb/ANC90LA012

## Probable cause

FATIGUE FAILURE OF THE RIGHT RUDDER BAR.  A FACTOR RELATED TO THE ACCIDENT WAS: ROUGH/UNEVEN TERRAIN BESIDE THE RUNWAY.

## Sequence of events

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

- Airframe/component/system failure/malfunction, landing - roll
  - flight control,rudder - fatigue (cause)
- Loss of control - on ground/water, landing - roll
  - directional control - not possible
  - ground loop/swerve - uncontrolled
- On ground/water encounter with terrain/water, landing
  - terrain condition - rough/uneven (contributing factor)

## Aircraft

- Registration: [N6255H](https://openairdocs.org/aircraft/N6255H), registered now, S/N 20700452 (OpenAirDocs)
- Reported make and model: CESSNA 207
- Registry model: [Cessna 207A](https://openairdocs.org/model/cessna-207a) (registry code 2073604) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 20700452
- Airframe hours: 5389
- Engines: CONTINENTAL IO-520-F 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Operator: Kusko Aviation
- Registered owner: Gunder, Dennis L
- Last inspection: 100 hour, March 3, 1989, 80 hours before
- Departed: BET, BETHEL, AK
- Flight plan: Company VFR
- Airport: AQH, Quinhagak, runway 22, 2,600 × 70 ft, gravel

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 29; flight instructor, airline transport; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 4,100 total, 1,200 in this make and model, 3,900 as pilot in command, 60 in the last 90 days, 25 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Night/bright
- Wind: 360° at 3 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: -0 °F, dew point 5 °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 19891107063219A](https://openairdocs.org/incident/19891107063219A), Nov 7, 1989: Cessna 207A, Quinhagak, AK, Substantial damage. Rudder pedal arm broke due to fatigue. Aircraft veered off runway on the landing roll.

## Other investigations on N6255H (2)

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 ANC91LA066](https://openairdocs.org/ntsb/ANC91LA066), Jun 6, 1991: Cessna 207A (N6255H), Eek, AK, substantial damage. Probable cause: WAS FUEL CONTAMINATION. CONTRIBUTING FACTORS ARE THE ENGINE VIBRATIONS AND THE ROUGH VEGETATION UPON WHICH THE AIRPLANE LANDED.
- [NTSB ANC79FA060](https://openairdocs.org/ntsb/ANC79FA060), Jun 11, 1979: Cessna 207 (N6255H), Platinum, 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.

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