ASN Wikibase Occurrence # 213473
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| Date: | Friday 13 July 2018 |
| Time: | 17:35 UTC |
| Type: | Aero Eli Servizi Yo-Yo Series 3 |
| Owner/operator: | private |
| Registration: | I-C881 |
| MSN: | 0032 |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Musile di Piave, Venezia -
 Italy
|
| Phase: | Take off |
| Nature: | Ferry/positioning |
| Departure airport: | Caposile Airfield |
| Caposile Airfield | |
| Investigating agency: | ANSV |
| Confidence Rating: |  Accident investigation report completed and information captured |
Following a training flight, an Aero Eli Servizi Yo-Yo Series 3 was to be moved from its parking area, near the club house, to the area in front of the hangar, where it would be parked. Following takeoff, the pilot lost control of the helicopter, which crashed into an agricultural field about 600 m away from the takeoff point.
As a result of the impact on the ground, the pilot, seated on the right and the only person on board, lost his life and the ultralight helicopter was destroyed.
The Yo-Yo helicopter was a significantly modified Robinson R22 helicopter, bringing down the emtpy weight by 100 kg by using composite materials.
Causes
The accident was reasonably caused by in-flight failure of the shaft transmitting motion to the tail rotor, caused by excessive engine/main rotor RPM, which was not limited as a result of the pilot's failure to engage the RPM governor before takeoff.
It cannot be ruled out that the pilot attempted to engage the aforementioned governor subsequent to takeoff, but this did not have the desired effect, as the takeoff probably occurred at an engine RPM outside the governor's operating range.
The following factors reasonably contributed to the occurrence of the accident:
- the pilot's probable unawareness of the prohibition against taking off with governor on OFF;
- the lack of information in the Yo-Yo's Flight Manual regarding the engagement of the RPM governor and the possible catastrophic structural damage resulting from an in-flight engine overspeed
Accident investigation:
 |
|
Sources:
http://www.ansv.it/It/Detail_relazioni.asp?ID=2123
http://nuovavenezia.gelocal.it/venezia/cronaca/2018/07/14/news/musile-si-alza-in-volo-e-precipita-con-l-elicottero-imprenditore-40enne-muore-sul-colpo-1.17056566
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 19-Jul-2018 07:17 | MKAPPE | Added |
| 19-Jul-2018 07:18 | harro | Updated [Aircraft type, Operator, Narrative] |
| 09-Jun-2022 11:58 | harro | Updated [Time, Aircraft type, Cn, Operator, Phase, Nature, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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