ASN Wikibase Occurrence # 301160
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| Date: | Saturday 12 November 2022 |
| Time: | |
| Type: |  Robinson R22 Beta II |
| Owner/operator: | Valair AG |
| Registration: | HB-ZOF |
| MSN: | 4154 |
| Year of manufacture: | 2007 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Maienfeld, GR -
 Switzerland
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | Balzers/Fl Heliport (LSXB) |
| Maienfeld | |
| Investigating agency: | STSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The student pilot was trying to take off and land in mountainous areas near Maienfeld, Graubünden, at an elevation of 1880 m. The first two manoeuvres went well, but in the third, the student noticed a problem with the helicopter and passed the controls to the instructor.
However, the latter was unable to regain control of the aircraft, which fell back by rolling over to the ground before coming to rest.
Both were not injured.
The accident, in which a helicopter suffered a rotor speed drop during takeoff from an elevated landing site and subsequently collided with terrain, was due to the helicopter's power limits being exceeded, probably accentuated by a partially pulled carburetor preheating.
The following factors contributed to the accident:
- A failure to consistently check power reserves during hover;
- a questionable training facility;
- insufficient safety margins given the instructor's still limited experience in mountain flight training.
Accident investigation:
 |
|
Sources:
https://switzerlandtimes.ch/world/student-pilot-loses-control-helicopter-crashes/
https://www.fireworld.at/2022/11/13/schweiz-heli-stuerzt-bei-gebirgslandeuebungen-in-maienfeld-ab-und-ueberschlaegt-sich/
https://www.bluewin.ch/fr/infos/faits-divers/chute-d-un-h-licopt-re-aux-grisons-les-occupants-indemnes-1467500.html
https://www.heli-archive.ch/en/helicopters/helicopter-accidents/12112022-robinson-r-22-beta-ii-hb-zof-maienfeld-gr?fbclid=IwAR3OwY6vLcUaA6n4dp6WwXgXBe0rzDyxI4dL2ciH143RPCsyP9AJbqr5ByU
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Nov-2022 20:34 | Dupont Dédé | Added |
| 13-Nov-2022 20:35 | harro | Updated [Time, Aircraft type, Registration, Cn, Operator, Location, Departure airport, Narrative] |
| 13-Nov-2022 21:26 | RobertMB | Updated [Aircraft type, Registration, Cn, Operator, Location, Departure airport, Source, Narrative] |
| 13-Nov-2022 22:35 | RobertMB | Updated [Registration, Departure airport, Source, Damage, Narrative] |
| 14-Nov-2022 12:54 | Iceman 29 | Updated [Embed code] |
| 14-Nov-2022 14:05 | RobertMB | Updated [Source, Embed code] |
| 20-Jul-2023 07:42 | harro | Updated [[Source, Embed code]] |
Corrections or additions? ... Edit this accident description
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