# NTSB ENG25WA033: Bell 505, Petersgrat Mountain, Switzerland, April 10, 2025

- Type: NTSB accident investigation
- Date: April 10, 2025, 08:25 UTC, 08:25 local
- Place: Petersgrat Mountain, Switzerland · Petersgrat Mountain Landing Site (LSVP)
- Coordinates: 46.46889, 7.82833 (estimated)
- Highest injury: Serious injuries
- Injuries: 2 serious, 1 uninjured
- Status: N/A
- Investigation class: Class 5 - No publish
- NTSB office: Aviation Engineering Division
- Parties: STSB
- NTSB case key (mKey): 200105
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ENG25WA033
- NTSB report (PDF): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/200105/pdf
- Page: https://openairdocs.org/ntsb/ENG25WA033

## Sequence of events

- Landing: Roll over (defining event)

## Aircraft

- Registration: HB-ZWF (not matched to a registry record)
- Reported make and model: BELL 505
- Category: Helicopter
- Serial number: 65299
- Damage: Destroyed
- Operator: Mountain Flyers
- Departed: LSZB, Bern, OF
- Destination: LSVP, Petersgrat Mountain Landing Site, OF
- Airport: LSVP, Petersgrat Mountain Landing Site

## Weather



From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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From OpenAirDocs.org, an independent open copy of NTSB and FAA data. The NTSB's own report is the official record of an investigation.