# NTSB ANC89LA066: Cessna 150A, N5773E, Chisana, AK, April 26, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 26, 1989, 08:00 local (16:00 UTC)
- Place: Chisana, AK
- Coordinates: 63.179061, -143.10028 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=63.1791&lon=-143.1003&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 2, 1990
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5182
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC89LA066
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5182/pdf
- Page: https://openairdocs.org/ntsb/ANC89LA066

## Probable cause

THE PILOT'S SELECTION OF UNSUITABLE TERRAIN FOR THE LANDING.THE SOFT/UNEVEN TERRAIN IS CONSIDRED TO BE A CONTRIBUTING FACTOR.

## Sequence of events

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

- Nose over, landing - roll
  - terrain condition - rough/uneven (contributing factor)
  - terrain condition - soft (contributing factor)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)

## Analysis

THE PLT LANDED IN A FIELD WHICH HE KNEW CONTAINED AREAS OF MUD. DURING THE LANDING ROLL, THE ACFT CONTACTED A LARGE MUDDY AREA. THE NOSE GEAR SANK INTO THE MUD AND THE ACFT NOSED OVER.

## Aircraft

- Registration: [N5773E](https://openairdocs.org/aircraft/N5773E), registered now, S/N 17273 (OpenAirDocs)
- Reported make and model: CESSNA 150A
- Registry model: [Cessna 150](https://openairdocs.org/model/cessna-150) (registry code 2071802) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 17273
- Engines: LYCOMING 0320-E2D 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Robert Frisbie
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, April 24, 1989, 2 hours before
- Departed: CZN, CHISANA, AK
- Airport: Homestead Strip

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; commercial; airplane ratings: single-engine land; instrument ratings: airplane, helicopter; medical: class 2, expired; seat: left; flight hours: 780 total, 480 in this make and model, 4 in the last 90 days, 2 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 25 statute miles
- Lowest ceiling: none
- Temperature: 39 °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 19890426011479A](https://openairdocs.org/incident/19890426011479A), Apr 26, 1989: Cessna STC150, Chisana, AK, Substantial damage. Ran into soft mud on the dirt strip. Aircraft nosed over as nose wheel mired down.

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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