# NTSB ANC91LA035: Cessna 180K, N66036, Amos Lakes, AK, March 10, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 10, 1991, 17:30 local (21:30 UTC)
- Place: Amos Lakes, AK
- Coordinates: 62.450302, -149.78984 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=62.4503&lon=-149.7898&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 5, 1993
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5526
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC91LA035
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5526/pdf
- Page: https://openairdocs.org/ntsb/ANC91LA035

## Probable cause

THE PILOT'S SELECTION OF TERRAIN THAT WAS ROUGH, SNOW-COVERED AND ICY FOR TAKEOFF.

## Sequence of events

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

- Loss of control - on ground/water, takeoff - roll/run
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)
  - terrain condition - rough/uneven (contributing factor)
  - terrain condition - snow covered (contributing factor)
  - terrain condition - icy (contributing factor)
- On ground/water collision with object, takeoff - aborted
  - object - tree(s)

## Analysis

THE PILOT STATED THAT, DURING THE TAKEOFF ON THE FROZEN LAKE, HE ENCOUNTERED VERY ROUGH SURFACE CONDITIONS WHICH DID NOT ALLOW THE AIRPLANE TO REACH LIFTOFF SPEED.  DURING THE ABORTED TAKEOFF, THE PILOT ENCOUNTERED AN AREA OF VERY SLICK SNOW-COVERED ICE.  THE AIRPLANE WENT STRAIGHT AHEAD INTO THE TREES BEFORE COMING TO A STOP.

## Aircraft

- Registration: [N66036](https://openairdocs.org/deregistered/N66036-2009-07-27), registration cancelled 2009-07-27, S/N 18052908, built 1977 (OpenAirDocs)
- Reported make and model: CESSNA 180K
- Registry model: [Cessna 180K](https://openairdocs.org/model/cessna-180k) (registry code 2072624) (OpenAirDocs)
- Registry engine: [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series) (registry code 17026, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 18052908
- Airframe hours: 915
- Engines: CONTINENTAL O-470-VC 230 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Carroll K. Moon
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, April 18, 1990, 173 hours before
- Destination: MRI, ANCHORAGE, AK
- Flight plan: VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 55; flight engineer, flight instructor, airline transport; airplane ratings: single-engine sea, multi-engine sea, single-engine land, multi-engine land; instrument ratings: helicopter, airplane; medical: class 1, valid medical--no waivers/lim.; seat: right; flight hours: 13,990 total, 400 in this make and model, 12,000 as pilot in command, 12 in the last 90 days, 12 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 19 °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 19910310006619A](https://openairdocs.org/incident/19910310006619A), Mar 10, 1991: Cessna 180K, Amos Lake, AK, Substantial damage. Tried to take wheel equipped aircraft off from snow drifted frozen lake. Too slow,aborted. Unable stop on ice.

## Other investigations on N66036 (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 ANC08LA042](https://openairdocs.org/ntsb/ANC08LA042), Mar 11, 2008: Cessna 180 (N66036), White Mountain, AK, substantial damage. Probable cause: The pilot’s inadvertent flight into flat light/whiteout conditions over snow-covered terrain.

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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