# NTSB CEN17WA143: Aerospatiale AS355, Snowdonia, United Kingdom, March 29, 2017

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Foreign investigation
- Date: March 29, 2017, 15:00 local (15:00 UTC)
- Place: Snowdonia, United Kingdom
- Coordinates: 52.840278, -3.994999 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=52.8403&lon=-3.9950&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Defining event: [Enroute: Controlled flight into terr/obj (CFIT)](https://openairdocs.org/ntsb-events/120)
- Highest injury: Fatal
- Injuries: 5 fatal
- Status: Led by another country's authority
- NTSB office: Central Region
- Lead agency: Other
- Parties: Rolls Royce
- NTSB case key (mKey): 94937
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN17WA143
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/94937/pdf
- Page: https://openairdocs.org/ntsb/CEN17WA143

## Sequence of events

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

- [Enroute: Controlled flight into terr/obj (CFIT)](https://openairdocs.org/ntsb-events/120) (defining event); cases with it: [All aircraft, 1,074 cases](https://openairdocs.org/ntsb-events/120/sequence.md)

## Factual narrative

On March 29, 2017, about 1500 coordinated universal time, an Aerospatiale AS355 F1 helicopter, G-OHCP, collided with Rhinog Fawr mountain in Snowdonia, Wales, United Kingdom. The pilot and four passengers were fatally injured.The accident investigation is under the jurisdiction and control of the government of the United Kingdom. This report is for information purposes only and contains only information released by or obtained from the United Kingdom. Further information pertaining to this accident may be obtained from: Air Accidents Investigation Branch (AAIB) Farnborough House Berkshire Copse Road Aldershot, Hampshire GU11 2HH, United Kingdom Tel: +44 (0)1252 510300 Fax: +44 (0)1252 376999 https://www.gov.uk/government/organisations/air-accidents-investigation-branch

## Aircraft

- Registration: G-OHCP (not matched to a registry record)
- Reported make and model: AEROSPATIALE AS355 (F1)
- Category: Helicopter
- Serial number: 5249
- Engines: Rolls-Royce 250-C20F turbo shaft; Rolls-Royce 250-C20F turbo shaft
- Damage: Destroyed
- Fire: Unknown
- Flight: Personal, Non-U.S., non-commercial
- Registered owner: Staske Construction Ltd
- Departed: Milton Keynes
- Destination: EIWT, Dublin
- Flight plan: Unknown

## Weather

- Conditions: Instrument (IMC)
- Wind: 170° at 22 knots
- Visibility: 4 statute miles
- Lowest ceiling: 300 ft overcast
- Temperature: 52 °F, dew point 52 °F
- Altimeter: 29.94 inHg
- Observed at: EGOD, 5 nm away

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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