# NTSB ANC88FA056: Cessna U206, N4844X, Anchorage, AK, May 14, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Field investigation · Final report
- Date: May 14, 1988, 08:58 local (16:58 UTC)
- Place: Anchorage, AK
- Coordinates: 61.159439, -149.989456 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.1594&lon=-149.9895&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report April 25, 1989
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4951
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC88FA056
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4951/pdf
- Page: https://openairdocs.org/ntsb/ANC88FA056

## Sequence of events

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

- Loss of control - on ground/water, taxi - to takeoff
  - stolen aircraft/unauthorized use, unqualified person (cause)
  - aircraft control - not understood, unqualified person (cause)
- On ground/water collision with object, taxi - to takeoff
  - object - building(nonresidential) (contributing factor)
  - object - vehicle (contributing factor)

## Analysis

A DEAF-MUTE ADULT MALE, WHO HAS A HISTORY OF MENTAL HEALTH PROBLEMS, AND WHO WAS A MENTAL HEALTH WARD OF THE STATE OF ALASKA AT THE TIME OF THE ACCIDENT, ENTERED A CESSNA 206 AIRPLANE EQUIPPED WITH AMPHIBIOUS FLOATS WITHOUT PERMISSION WHILE IT WAS PARKED ON AN UNCONTROLLED RAMP AREA NEAR ANCHORAGE INTERNATIONAL AIRPORT. HE SUBSEQUENTLY STARTED THE KEYLESS AIRPLANE AND TAXIED IT AT NEARLY  FULL POWER FOR APPROXIMATELY 185 FEET UNTIL IT COLLIDED WITH A COMMERCIAL BUILDING AND A PARKED AUTOMOBILE. THE 'PILOT' WAS APPREHENDED AND TAKEN INTO CUSTODY BY LAW ENFORCEMENT OFFICERS.

## Aircraft

- Registration: [N4844X](https://openairdocs.org/deregistered/N4844X-2013-07-02), registration cancelled 2013-07-02, S/N U20605553, built 1980 (OpenAirDocs)
- Reported make and model: CESSNA U206
- Registry model: [Cessna U206G](https://openairdocs.org/model/cessna-u206g) (registry code 2073356) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: U20605553
- Engines: CONTINENTAL IO-520F 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Orin Seybert
- Airworthiness certificate: Standard, Normal
- Airport: ANC, Anchorage Int'L

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 33; seat: left

## Weather

- Conditions: Visual (VMC), Day
- Wind: 160° at 18 knots, gusting 23
- Visibility: 30 statute miles
- Lowest ceiling: 8,000 ft broken
- Temperature: 61 °F, dew point 30 °F
- Altimeter: 29.00 inHg
- Observed at: ANC

## 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 19880514015139A](https://openairdocs.org/incident/19880514015139A), May 14, 1988: Cessna U206G, Anchorage, AK, Substantial damage. Deaf mute retarded ward of state started and taxied aircraft for takeoff but struck vehicles and a building.

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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