Bell 505 HB-ZWF accident near Petersgrat Mountain, Switzerland, April 10, 2025
Bell 505, registration HB-ZWF, operated by Mountain Flyers 80 Ltd, was involved in an accident near Petersgrat Mountain, Switzerland on April 10, 2025. The NTSB lists the highest injury level as serious, with 2 people on board. Case ENG25WA033 is n/a.
ADS-B receivers recorded 24 minutes of the flight after departing the Bern Arpt area (LSZB), reaching a maximum of 3,875 ft. The last recorded position was at 07:38 UTC, at 2,425 ft and 98 knots, descending at 1,024 feet per minute, about 33 km from Bern Arpt (LSZB).
The nearest weather report, from LSZB (33 km away), showed calm wind, visibility 6 miles or more, no ceiling reported (VFR conditions).
The aircraft is a Bell 505 Jet Ranger X registered in Switzerland (Mode S 4B4445).
This page reconstructs the flight from public ADS-B data for information only. The NTSB report is the authority on what happened and why.
Key facts
- Date
- April 10, 2025
- Location
- Petersgrat Mountain, Switzerland
- Aircraft
- Bell 505
- Registration
- HB-ZWF
- Operator
- Mountain Flyers 80 Ltd
- Injuries
- Serious (2 on board)
- NTSB case
- ENG25WA033 (N/A)
- Departure area
- Bern Arpt (LSZB)
- Nearest airport
- Bern Arpt (LSZB)
- Recorded flight
- 24 min, max 3,875 ft
- Last recorded position
- 07:38 UTC, 2,425 ft, 98 kt
3D flight replay
Replay the recorded flight in 3D with the weather, light and terrain at the time, flight instruments reconstructed from the aircraft's ADS-B transmissions, and automatically detected events.
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- Dornier 328 D-CSUE, Zurich, Switzerland, April 20, 2024
- Dornier 328 D-CSUE, Zurich, Switzerland, April 20, 2024
- Cessna 172 HB-TDD, Grenchen, Switzerland, March 26, 2024
- Bell Helicopter Textron Canada 505 N505GR, Fort Worth, Texas, August 27, 2025
- Bell Helicopter Textron Canada 505 N9TV, Bethany, Oklahoma, April 30, 2025
- Bell Textron Canada Ltd 505 N57NC, Dublin, Ireland, July 30, 2024
- Bell 505 SP-RMK, Minsk, Poland, May 16, 2024
Sources: NTSB case ENG25WA033; ADS-B flight data from adsb.lol (ODbL); weather from NOAA / Iowa Environmental Mesonet and Open-Meteo.