ASN Wikibase Occurrence # 188222
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| Date: | Thursday 9 June 2016 |
| Time: | 16:10 LT |
| Type: |  Bell 206B JetRanger |
| Owner/operator: | Helitrans AG |
| Registration: | HB-XSL |
| MSN: | 1516 |
| Year of manufacture: | 1974 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Minor |
| Category: | Accident |
| Location: | 1km SE of Heimenschwand/BE -
 Switzerland
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Training |
| Departure airport: | LSZB |
| LSZB | |
| Investigating agency: | STSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The helicopter had an engine-failure during a proficiency check ride. The helicopter was practicing autorotations as the failure happened. The pilot managed to land the Bell sustained only minor damage.
Causes
The accident, during which the helicopter’s engine failed while performing an autorotation exercise, can be attributed to the rupture of the first-stage turbine wheel.
The following factors were identified as root causes to the accident:
- The engine’s turbine outlet temperature had been exceeded at an earlier point on at least one occasion.
- The measures deemed necessary by the manufacturer, which are prescribed after the turbine outlet temperature has been exceeded, were not implemented.
The following factors were identified neither as causes nor as having directly contributed, but nevertheless as factors to risk:
- Failure to implement an airworthiness directive;
- In relation to certain safety-related aspects, the entries in the technical files did not correspond to the actual technical condition of the helicopter.
Accident investigation:
 |
|
Sources:
http://www.sust.admin.ch/pdfs/AV-berichte/HB-XSL.pdf
History of this aircraft
Other occurrences involving this aircraft
| 26 August 1990 | HB-XSL | Mountain Flyers 80 | 0 | Sensegraben, BE | |
sub |
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 18-Jun-2016 12:14 | Alpine Flight | Added |
| 07-Feb-2018 08:54 | harro | Updated [Narrative] |
Corrections or additions? ... Edit this accident description
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