# NTSB ANC85LA021: Cessna 207, N1606U, Koliganek, AK, November 20, 1984

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: November 20, 1984, 15:45 local (19:45 UTC)
- Place: Koliganek, AK
- Coordinates: 58.82035, -157.859573 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=58.8203&lon=-157.8596&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor, 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4449
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC85LA021
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4449/pdf
- Page: https://openairdocs.org/ntsb/ANC85LA021

## Analysis

THE ACFT CRASHED WHEN IT FAILED TO BECOME AIRBORNE DURING THE TAKEOFF RUN. THE PLT & WITNESSES AGREED THAT SNOW WAS NOT REMOVED FROM THE ACFT PRIOR TO DEPARTURE.

## Sequence of events

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

- Overrun, takeoff - roll/run
  - wing - ice (contributing factor)
  - ice/frost removal from aircraft - disregarded, pilot in command (cause)
  - judgment - poor, pilot in command (cause)
  - complacency, pilot in command (cause)
- On ground/water encounter with terrain/water, takeoff - roll/run

## Aircraft

- Registration: N1606U (not matched to a registry record)
- Reported make and model: CESSNA 207
- Category: Airplane
- Serial number: 20700296
- Airframe hours: 11074
- Engines: CONTINENTAL IO-520-F13 285 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Registered owner: Yute Air Alaska, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, May 1, 1984, 84 hours before
- Departed: KGK, KOLIGANEK, AK
- Destination: DLG, DILLINGHAM, AK
- Flight plan: Company VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 26; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 2,915 total, 500 in this make and model, 2,745 as pilot in command, 245 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 40° at 10 knots
- Visibility: 5 statute miles
- Lowest ceiling: 1,000 ft overcast
- Temperature: 30 °F, dew point -0 °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 19841120063449A](https://openairdocs.org/incident/19841120063449A), Nov 20, 1984: Cessna 207, Koliganek, AK, Substantial damage. Attempted takeoff with wet snow on wings and runway. Could not lift off. Rolled off end of runway onto soft tundra.

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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