# NTSB ANC86LA155: Piper PA-22, N1712P, Naknek, AK, September 14, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 13, 1986, 16:45 local (Sep 14, 1986, 00:45 UTC)
- Place: Naknek, AK
- Coordinates: 58.800777, -156.899169 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=58.8008&lon=-156.8992&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4739
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC86LA155
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4739/pdf
- Page: https://openairdocs.org/ntsb/ANC86LA155

## 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 - high wind (cause)
  - preflight planning/preparation - improper, pilot in command (cause)
  - weather condition - gusts (cause)
  - wind information - not attained, pilot in command (cause)
  - weather evaluation - inadequate, pilot in command (cause)
- Nose over, taxi - to takeoff

## Analysis

DURING THE TAXI TO TAKEOFF PHASE A STRONG GUST OF WIND LIFTED THE LEFT WING CAUSING THE AIRPLANE TO FLIP OVER ON ITS BACK.

## Aircraft

- Registration: [N1712P](https://openairdocs.org/deregistered/N1712P-2017-02-22), registration cancelled 2017-02-22, S/N 22-2502, built 1954 (OpenAirDocs)
- Reported make and model: PIPER PA-22
- Registry model: [Piper PA-22-150](https://openairdocs.org/model/piper-pa-22-150) (registry code 7102210) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 222502
- Engines: LYCOMING O-320-A2B 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Ralph Angasan
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, November 1, 1985

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 2,400 total, 2,400 in this make and model, 2,350 as pilot in command, 90 in the last 90 days, 40 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 10 knots, gusting 20
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 70 °F, dew point 39 °F
- Altimeter: 29.00 inHg

## 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 19860913044859A](https://openairdocs.org/incident/19860913044859A), Sep 13, 1986: Piper PA22150, Naknek, AK, Substantial damage. While inspecting an off airport site,aircraft was flipped over during a 180 degree taxiing turn by strong wind gust

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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