ASN Wikibase Occurrence # 212050
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| Date: | Monday 11 June 2018 |
| Time: | 13:58 |
| Type: |  Eurocopter AS 350B3 Ecureuil |
| Owner/operator: | Lions Air Skymedia |
| Registration: | HB-ZOJ |
| MSN: | 4479 |
| Year of manufacture: | 2008 |
| Total airframe hrs: | 6050 hours |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Surenen Pass, 3nm SW of Seedorf, UR -
 Switzerland
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | External load operation |
| Departure airport: | |
| Investigating agency: | STSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The helicopter crashed on high ground during an underslung load tasking. There was a post-impact fire. The Pilot, sole POB, died.
The accident, in which the helicopter collided with the terrain while underloaded, was due to the pilot aborting the flight mission too late considering the oncoming dense fog and losing control of the helicopter after losing visual references.
The following factors were identified as contributing:
- Flight mission involving people from different companies who did not know each other and who did not define a common understanding of safety-related aspects, at least concerning the weather;
- Pressure situation due to an overly optimistic assessment of the weather conditions for a concrete transport;
- Lack of agreement on a reserved decision regarding the cancellation or termination of the flight order.
The following factors were identified as neither causal nor directly contributing, but as risky (factor to risk):
- Failure to comply with the manufacturer's request to repair the main gear due to metal chips present;
- Use of a method of attachment of the load handling attachment to the helicopter's primary load hook that should be avoided according to the manufacturer.
Accident investigation:
 |
|
Sources:
http://www.20min.ch/schweiz/zentralschweiz/story/Helikopter-Pilot-stirbt-bei-Absturz-25302760
http://www.heli-archive.ch/en/helicopters/helicopter-accidents/11062018-as-350b3-ecureuil-surenen-attinghausenur/
https://aerossurance.com/air-accidents-incidents/a-concrete-case-of-commercial-pressure-fatal-swiss-heslo-accident/
ex.F-WWPS, SE-JKE, LN-OXG.
Location
Media:
A Concrete Case of Commercial Pressure: Helicopter external sling load ops continued as weather deteriorated with fatal consequences. https://t.co/LoIppSCMjZ… #heslo #helicopter #flightsafety #aviationsafety pic.twitter.com/yZTwIumpNA
— Aerossurance (@Aerossurance) August 5, 2023
20 Minuten - Helikopter-Pilot stirbt bei Absturz - Zentralschweiz, Switzerland.https://t.co/2jSEuN3Vvr via @20min pic.twitter.com/fFjMz4tQuA
— Planes Of Legend (@PlanesOfLegend) 13 juin 2018
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 12-Jun-2018 09:58 | Aerossurance | Added |
| 12-Jun-2018 10:02 | Aerossurance | Updated [Cn, Nature, Narrative] |
| 12-Jun-2018 17:12 | A.J. Scholten | Updated [Source] |
| 12-Jun-2018 22:19 | Geno | Updated [Location, Source] |
| 13-Jun-2018 07:56 | Iceman 29 | Updated [Embed code, Narrative] |
| 06-Oct-2022 12:50 | harro | Updated [Time, Phase, Embed code, Narrative, Category, Accident report] |
| 05-Aug-2023 13:27 | Aerossurance | Updated [[Time, Phase, Embed code, Narrative, Category, Accident report]] |
| 12-Nov-2023 20:26 | harro | Updated [Other fatalities, Embed code, Category] |
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