# NTSB ANC91LA080: Cessna 170A, N5739C, Kakeen, AK, June 23, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 23, 1991, 15:00 local (23:00 UTC)
- Place: Kakeen, AK
- Coordinates: 58.800777, -156.900177 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=58.8008&lon=-156.9002&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 7, 1993
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5564
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC91LA080
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5564/pdf
- Page: https://openairdocs.org/ntsb/ANC91LA080

## Probable cause

THE PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL OF THE AIRPLANE DURING THE ABORTED TAKEOFF.  CONTRIBUTING TO THE ACCIDENT WAS THE SOFT, ROUGH, AND UNEVEN TERRAIN.

## Analysis

DURING THE ABORTED TAKEOFF, THE PILOT LOST DIRECTIONAL CONTROL OF THE AIRPLANE BECAUSE THE LEFT MAIN TIRE DUG INTO THE SOFT SAND.  THE AIRPLANE THEN NOSED OVER ON ITS BACK.

## Sequence of events

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

- Loss of control - on ground/water, takeoff - aborted
  - terrain condition - soft (contributing factor)
  - directional control - not maintained, pilot in command (cause)
  - terrain condition - rough/uneven (contributing factor)
- Nose over, takeoff - aborted

## Aircraft

- Registration: [N5739C](https://openairdocs.org/aircraft/N5739C), registered now, S/N 19693, built 1950 (OpenAirDocs)
- Reported make and model: CESSNA 170A
- Registry model: [Cessna 170A](https://openairdocs.org/model/cessna-170a) (registry code 2072304) (OpenAirDocs)
- Category: Airplane
- Serial number: 19693
- Airframe hours: 4000
- Engines: CONTINENTAL C-145-2H 145 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: William Kirk
- Registered owner: William Kirk
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, October 1, 1990, 50 hours before
- Departed: SNK, NAKNEK, AK
- Airport: NONE, Kakeen, runway 6, 1,200 × 40 ft, gravel

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 31; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 550 total, 50 in this make and model, 550 as pilot in command, 50 in the last 90 days, 20 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 81 °F, dew point 46 °F
- Altimeter: 29.00 inHg

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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