# NTSB ANC83FA134: Cessna 150, N6446K, Anchorage, AK, July 29, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Field investigation · Final report
- Date: July 28, 1983, 18:00 local (Jul 29, 1983, 02:00 UTC)
- Place: Anchorage, AK
- Coordinates: 61.159492, -149.989837 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.1595&lon=-149.9898&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4044
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC83FA134
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4044/pdf
- Page: https://openairdocs.org/ntsb/ANC83FA134

## 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
  - weather condition - unfavorable wind (contributing factor)
  - brakes(normal) - improper, dual student (cause)
  - supervision - inadequate, pilot in command(cfi) (cause)
- In flight collision with terrain/water, taxi - to takeoff
  - terrain condition - ditch (contributing factor)

## Analysis

THE ACFT DURING TAXI TO TAKEOFF IN A WIND OF 11 KTS GUSTING TO 19 KTS SUDDENLY WENT OFF THE TAXIWAY INTO A 30 FT DEEP OPEN DITCH. THIS WAS A DUAL INSTRUCTIONAL FLT AND THERE WAS APPARENTLY NO MECHANICAL MALFUNCTIONS EVEN THOUGH THE CFI STATED THAT THIS ACFT HAD TWO PREVIOUS BRAKE PROBLEMS. THE BRAKES WERE EXAMINED AND THE EXAMINATION FAILED TO REVEAL ANYMECHANICAL FAILURE OR MALFUNCTION IN THE SYSTEM.

## Aircraft

- Registration: [N6446K](https://openairdocs.org/deregistered/N6446K-2012-02-24), registration cancelled 2012-02-24, S/N 15077707, built 1975 (OpenAirDocs)
- Reported make and model: CESSNA 150
- Registry model: [Cessna 150M](https://openairdocs.org/model/cessna-150m) (registry code 2071830) (OpenAirDocs)
- Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 15077707
- Airframe hours: 4694
- Engines: LYCOMING O-200A 100 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: Airplane Store
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, August 23, 1983, 56 hours before
- Airport: ANC, Anchorage

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 30; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land, single-engine sea; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: right; flight hours: 1,575 total, 326 in this make and model, 1,221 as pilot in command, 206 in the last 90 days, 100 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 200° at 11 knots, gusting 19
- Visibility: 60 statute miles
- Lowest ceiling: none
- Temperature: 72 °F, dew point 46 °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 19830728038949A](https://openairdocs.org/incident/19830728038949A), Jul 28, 1983: Cessna 150M, Anchorage, AK, Substantial damage. Student lost control taxiing in gusty surface wind. Ran into a ditch. Instructor failed to take corrective action.

## Other investigations on N6446K (2)

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 ANC00LA045](https://openairdocs.org/ntsb/ANC00LA045), Apr 14, 2000: Cessna 150M (N6446K), Chickaloon, AK, substantial damage. Probable cause: The pilot's selection of an unsuitable landing area. Factors associated with the accident were an open service door, and snow-covered terrain.
- [NTSB ANC91LA029](https://openairdocs.org/ntsb/ANC91LA029), Feb 13, 1991: Cessna 150 (N6446K), Palmer, AK, substantial damage. Probable cause: THE PILOT-IN-COMMAND'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL.

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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