# NTSB ANC83LA014: Cessna 150, N7964V, Anchorage, AK, November 21, 1982

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: November 21, 1982, 12:37 local (16:37 UTC)
- Place: Anchorage, AK
- Location: 61.2181° N, 149.9003° W: Placed by OpenAirDocs: center of Anchorage, AK, within about 23 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=61.2181&lon=-149.9003&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report November 21, 1983
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 69775
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC83LA014
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/69775/pdf
- Page: https://openairdocs.org/ntsb/ANC83LA014

## Sequence of events

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

- Main gear collapsed, landing - roll
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)
  - terrain condition - icy
  - terrain condition - snow covered
  - terrain condition - rough/uneven (contributing factor)
  - landing gear,main gear - overload

## Analysis

PRIOR TO LANDING, THE PILOT WAS ADVISED THAT THE LAKES WERE CLOSED BY THE AIRPORT MANAGEMENT AND THAT HE WOULD BE LANDING AT HIS OWN RISK. HE ACKNOWLEDGED THE RADIO TRANSMISSION, BUT ELECTED TO LAND HIS SKI EQUIPPED PLANE ON THE FROZEN LAKE. THE LAKE HAD BEEN CLOSED DUE TO ROUGH, RUTTED ICE CONDITIONS WHICH HAD BEEN CONSIDERED UNSUITABLE FOR SKI OR WHEEL OPERATIONS. THE LANDING WAS NORMAL UNTIL ABOUT 300 TO 400 FT PAST THE TOUCHDOWN POINT WHERE THE LEFT SKI/GEAR ENCOUNTERED A DIAGONAL RUT AND FAILED.

## Aircraft

- Registration: [N7964V](https://openairdocs.org/aircraft/N7964V), registered now, S/N 18051864, built 1967 (OpenAirDocs)
- Reported make and model: CESSNA 150
- 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: 18051864
- Airframe hours: 5896
- Engines: CONTINENTAL O-470-R 230 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: George Wilfred Stewart
- Registered owner: George Wilfred Stewart
- Departed: A, BUTTERFLY LAKE, AK
- Destination: LHD, ANCHORAGE, AK
- Airport: Anchorage

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 54; private; airplane ratings: single-engine sea, single-engine land; medical: class 3, valid medical--w/ waivers/lim; flight hours: 543 total, 430 in this make and model, 513 as pilot in command, 4 in the last 90 days, 2 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 8 knots
- Visibility: 60 statute miles
- Lowest ceiling: 18,000 ft overcast
- Temperature: 72 °F
- Altimeter: 30.00 inHg
- Observed at: ANC, 7 nm away

## 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 19821121062499A](https://openairdocs.org/incident/19821121062499A), Nov 21, 1982: Cessna 180H, Anchorage, AK, Substantial damage. Aircraft crashed during landing when gear collapsed after hitting ruts on frozen runway.

## Other investigations on N7964V (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 SEA81DYK12](https://openairdocs.org/ntsb/SEA81DYK12), Jul 12, 1981: Cessna 180 (N7964V), Florence, OR, 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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