ASN Wikibase Occurrence # 285735
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| Date: | Friday 4 December 2009 |
| Time: | |
| Type: |  Aerospatiale AS 350B2 Ecureuil |
| Owner/operator: | Heli-air-monaco |
| Registration: | F-GMBO |
| MSN: | 2253 |
| Year of manufacture: | 1989 |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Saint-Sauveur-sur-Tinée -
 France
|
| Phase: | En route |
| Nature: | Passenger - Non-Scheduled/charter/Air Taxi |
| Departure airport: | Cime de Sistron |
| Monte Carlo Heliport (MCM/LNMC) | |
| Investigating agency: | BEA |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
The pilot lands on a peak at an altitude of 3500 meters. He cut the engine and put down 3 technicians in charge of a maintenance operation on a radio relay. He started again 55 minutes later and took off towards Monaco with 3 passengers. After about 5 minutes of flight, the pilot felt a strong unbalance of the main rotor then heared a continuous audible alarm indicating that the rotor speed has dropped and reached its lower limit. A strong smell of fuel was perceived in the cabin by the 4 occupants. The pilot lowered the general pitch and put the helicopter into autorotation while looking for a landing area in the valley floor ahead. The rotor speed went back to its nominal value. The pilot pulled the general pitch and noticed a new drop in rotor rpm. He deduced that the engine was no longer delivering power and that the landing would have to be made in autorotation. As he approached the ground, he chose a spot that appeared to be clear. On short final, the main rotor hit some trees. The helicopter became unbalanced, hit the ground and rolled onto its right side.
Examinations of the wreckage and the engine did not reveal any technical faults.
Conclusion: the investigation did not identify the cause of the engine shutdown
Sources:
https://bea.aero/en/investigation-reports/notified-events/detail/arret-du-moteur-en-vol-autorotation-basculement-sur-le-cote-lors-de-latterrissage
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Oct-2022 14:15 | harro | Added |
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