Piper PA-18-150 accident near Roundup, Montana, September 15, 2026
On September 15, 2026 at about 11:00 pm local time, a 1980 Piper PA-18-150, registered N4500W, was substantially damaged in an accident during landing (landing roll) near Roundup, Montana (Back Country Area airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 1 person was on board or involved. The weather was visual conditions (good weather).
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The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 4, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- September 15, 2026 · about 11:00 pm local time
- Place
- Roundup, Montana · Back Country Area · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Piper PA-18-150, built 1980 · all PA-18-150s on the register
- Registration
- N4500W · registry record · serial 18-8009019
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The factual record from the NTSB's investigation tables, in plain English
What happened, in order
- Nose over/nose down during landing (landing roll) defining event
- Loss of control on ground during landing (landing roll)
The aircraft
- Airframe total time: 4,039 hours
- Last inspection: annual inspection
- Seats: 2
- Landing gear: fixed
The flight
- Departed from: 9U1 Wilsall MT at 10:00 pm
- Flight plan: none
Weather at the time
- Light: daylight
- Wind: from 220° at 16 knots, gusting 20
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 66°F (19°C), dew point 41°F (5°C)
- Altimeter: 30.03 inHg
- Observation at 4:00 pm from K1NM, 20 miles away
Weather report (METAR): METAR K1NM 152155Z AUTO 22016G20KT 10SM CLR 19/05 A3003 RMK AO2 SLP165 T01880053 $
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flig | 1 |
Other NTSB records under N4500W the same tail number, which may have belonged to a different aircraft at the time
About this page
Everything above comes from the NTSB's public accident database: the narrative, probable cause and findings are the NTSB's own words, and the coded tables behind its report (pilot, aircraft, flight, weather, injuries, sequence of events) are written out in plain English. Pilots' ages, home towns and medical details are left out on purpose. The docket at the NTSB holds the report as a PDF and the investigation's photographs and documents. This site never names pilots, passengers or anyone else involved. A preliminary report describes what is known soon after the event and can change; the final report, with the probable cause, usually follows one to two years later and this page is refreshed when it does. Case number WPR26LA348.