# NTSB ANC86LA004: Cessna 206, N35851, Tanana, AK, October 16, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 16, 1985, 12:45 local (20:45 UTC)
- Place: Tanana, AK
- Coordinates: 60.879463, -146.65065 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=60.8795&lon=-146.6507&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4620
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC86LA004
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4620/pdf
- Page: https://openairdocs.org/ntsb/ANC86LA004

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, cruise - normal
  - aircraft preflight - inadequate, pilot in command (cause)
  - fluid,fuel - ice (cause)
  - fuel system,drain - frozen
  - fuel system,line - frozen
  - fuel system,pump - ice
  - fluid,fuel - starvation (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll
  - terrain condition - rough/uneven (contributing factor)
  - terrain condition - wet (contributing factor)

## Analysis

WHILE EN ROUTE, THE ENG LOST POWER, SO THE PLT MADE AN EMERGENCY LANDING ON A GRAVEL BAR. DURING THE LANDING, THE ACFT NOSED OVER & CAME TO REST IN WATER. AN EXAM REVEALED THAT THE FUEL SUMPS & LINES WERE FROZEN & THERE WAS ICE IN THE FUEL PUMP.

## Aircraft

- Registration: [N35851](https://openairdocs.org/aircraft/N35851), registered now, S/N U20602757 (OpenAirDocs)
- Reported make and model: CESSNA 206
- Registry model: [Cessna U206F](https://openairdocs.org/model/cessna-u206f) (registry code 2073333) (OpenAirDocs)
- Registry engine: [Continental IO-550 series](https://openairdocs.org/engine/continental-io-550-series) (registry code 17042, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: U20602757
- Airframe hours: 1204
- Engines: CONTINENTAL IO-520 285 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Registered owner: Dennis Parrish
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, September 13, 1985, 56 hours before
- Departed: ITUSLIA, AK
- Destination: FAI, FAIBANKS, AK
- Flight plan: VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 43; flight instructor, commercial; airplane ratings: single-engine land, single-engine sea; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 4,500 total, 1,000 in this make and model, 4,500 as pilot in command, 125 in the last 90 days, 75 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 20 knots
- Visibility: 5 statute miles
- Lowest ceiling: none
- Temperature: 19 °F, dew point 10 °F
- Altimeter: 29.00 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 19851016052529A](https://openairdocs.org/incident/19851016052529A), Oct 16, 1985: Cessna U206F, Tanana, AK, Substantial damage. Ice in fuel system caused engine failure. Landed on a gravel bar and aircraft slipped over onto its back.

## Other investigations on N35851 (1)

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 ANC10CA078](https://openairdocs.org/ntsb/ANC10CA078), Aug 27, 2010: Cessna U206F (N35851), Aleknagik, AK, substantial damage. Probable cause: A bird strike which penetrated the airplane's windscreen.

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.