# NTSB SEA90LA142: Piper PA-18-150, N4153Z, Dupuyer, MT, July 21, 1990

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: July 21, 1990, 13:50 local (19:50 UTC)
- Place: Dupuyer, MT
- Coordinates: 48.170574, -112.409614 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=48.1706&lon=-112.4096&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 1 uninjured
- Status: Completed, report February 12, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 41246
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA90LA142
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41246/pdf
- Page: https://openairdocs.org/ntsb/SEA90LA142

## Probable cause

PILOT'S MISJUDGED TOUCHDOWN AND DELAY IN INITIATING THE BALKED LANDING.

## Sequence of events

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

- In flight collision with object, landing - aborted
  - object - fence post (contributing factor)
  - aborted landing - delayed, pilot in command (cause)
  - touchdown - misjudged, pilot in command (cause)

## Analysis

THE PILOT WAS DISSATISFIED WITH HIS TOUCHDOWN POSITION AFTER LANDING ON A 560 FOOT RUNWAY AND INITIATED A BALKED LANDING. THE AIRCRAFT STRUCK A FENCE POST DURING THE GO-AROUND, AND CRASHED IN AN ADJACENT FIELD.

## Aircraft

- Registration: [N4153Z](https://openairdocs.org/aircraft/N4153Z), registered now, S/N 18-8331, built 1965 (OpenAirDocs)
- Reported make and model: PIPER PA-18-150
- 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: 18-8331
- Engines: LYCOMING O-320-A2B 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Donald A. Dodge
- Departed: 501, CONRAD, MT

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 45; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; flight hours: 643 total, 629 in this make and model, 602 as pilot in command, 15 in the last 90 days, 8 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 70° at 4 knots
- Visibility: 40 statute miles
- Lowest ceiling: 5,000 ft broken
- Temperature: -0 °F, dew point -0 °F
- Observed at: CTB, 25 nm away

## 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 19900721027669A](https://openairdocs.org/incident/19900721027669A), Jul 21, 1990: Piper PA18150, Dupuyer, MT, Substantial damage. Stabilizer wire caught on fence post on attempted go around. Lost control and crashed.

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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