# NTSB ANC82DA098: Piper PA-18, N5907Y, Near Port Alswo, AK, September 23, 1982

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: September 23, 1982, 13:00 local (21:00 UTC)
- Place: Near Port Alswo, AK
- Coordinates: 60.200748, -154.279769 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=60.2007&lon=-154.2798&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 23, 1983
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 71913
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC82DA098
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/71913/pdf
- Page: https://openairdocs.org/ntsb/ANC82DA098

## Sequence of events

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

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

## Analysis

ACCORDING TO THE PILOT, HE WAS LANDING ON THE TUNDRA AS HE HAD DONE BEFORE. AFTER ROLLING ABOUT 3/4 OF THE WAY DOWN THE STRIP, THE MAIN WHEELS HIT A DIP AND THE PLANE NOSED OVER.

## Aircraft

- Registration: [N5907Y](https://openairdocs.org/aircraft/N5907Y), registered now, S/N 18-8414, built 1966 (OpenAirDocs)
- Reported make and model: PIPER PA-18
- Registry model: [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150) (registry code 7101828) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 18-8414
- Airframe hours: 2200
- Engines: LYCOMING O-320-A2A 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Robert Norman Holt
- Registered owner: Robert Norman Holt
- Departed: Z30, PORT ALSWORTH, AK
- Destination: AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 24; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; flight hours: 285 total, 285 in this make and model, 285 as pilot in command

## Weather

- Conditions: Visual (VMC), Day
- Wind: 90° at 5 knots
- Temperature: 104 °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 19820923051789A](https://openairdocs.org/incident/19820923051789A), Sep 23, 1982: Piper PA18150, Port Alsworth, AK, Substantial damage. Pilot attempted off airport landing, aircraft hit dip and flipped inverted.

## Other investigations on N5907Y (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 ANC18LA080](https://openairdocs.org/ntsb/ANC18LA080), Sep 30, 2018: Piper PA18 (N5907Y), Delta Junction, AK, substantial damage. Probable cause: The total loss of engine power due to carburetor icing, which resulted from the pilot's failure to use carburetor heat while operating at low power settings in conditions conducive to the formation…
- [NTSB ANC86LA148](https://openairdocs.org/ntsb/ANC86LA148), Sep 5, 1986: Piper PA-18 (N5907Y), Farewell, AK, substantial damage

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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