# NTSB GAA22WA055: Mcdonnell Douglas 500, Unteriberg, Switzerland, December 18, 2021

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Class 5 · Foreign
- Date: December 18, 2021, 15:02 local (15:02 UTC)
- Place: Unteriberg, Switzerland
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Defining event: [Maneuvering: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Led by another country's authority
- Investigation class: Class 5 - No publish
- NTSB office: General Aviation Accidents
- Lead agency: Other
- NTSB case key (mKey): 104440
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA22WA055
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/104440/pdf
- Page: https://openairdocs.org/ntsb/GAA22WA055

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Maneuvering: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) (defining event); cases with it: [All aircraft, 3,820 cases](https://openairdocs.org/ntsb-events/341/sequence.md)

## Aircraft

- Registration: HB-ZBM (not matched to a registry record)
- Reported make and model: MCDONNELL DOUGLAS 500 (N)
- Category: Helicopter
- Damage: Substantial damage
- Flight: Non-U.S., non-commercial

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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