Bell 505 accident near Petersgrat Mountain, OF, April 10, 2025
On April 10, 2025 at about 8:25 am local time, a Bell 505 (helicopter), registered HBZWF, was destroyed in an accident during landing near Petersgrat Mountain, OF (Petersgrat Mountain Landing Si airport). It was flown under rules the NTSB did not record. 2 people were seriously injured; 1 other was unhurt.
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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
- April 10, 2025 · about 8:25 am local time
- Place
- Petersgrat Mountain, OF, Ch · Petersgrat Mountain Landing Si · map
- Type
- Accident
- Injuries
- 2 people were seriously injured; 1 other was unhurt.
- Weather
- not recorded
- Aircraft
- Bell 505 · all 505s on the register
- Registration
- HBZWF · no longer on the register · serial 65299
- Damage
- Destroyed
- Flight
- Flight · rules the NTSB did not record
The factual record from the NTSB's investigation tables, in plain English
What happened, in order
- Roll over during landing defining event
The aircraft
- Landing gear: fixed
The flight
- Departed from: LSZB Bern OF
- Destination: LSVP Petersgrat Mountain Landing Site OF
Weather at the time
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flig | 1 | 1 | ||
| Passengers | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
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 documents and photographs are the NTSB's docket, the folder of records gathered during the investigation, shown as the NTSB released them (the NTSB redacts some personal details first) and listed under the NTSB's own titles. This site's own text 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 ENG25WA033.