ASN Wikibase Occurrence # 238833
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| Date: | Monday 13 July 2020 |
| Time: | 12:50 |
| Type: |  Dynali H3 EasyFlyer |
| Owner/operator: | Hedespa |
| Registration: | EC-GS5 |
| MSN: | H3-22-1443 |
| Year of manufacture: | 2016 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Ontígola, Toledo -
 Spain
|
| Phase: | En route |
| Nature: | Test |
| Departure airport: | Ocaña |
| Ocaña | |
| Investigating agency: | CIAIAC |
| Confidence Rating: |  Accident investigation report completed and information captured |
The Dynali H3 Easy Flyer ultralight helicopter took off from the Ocaña aerodrome with the intention of conducting a test flight. Nine minutes after takeoff, when cruising at 1000 feet altitude and heading north, the aircraft's electrical power supply failed, causing the engine to shutdown, being an electronic injection.
The pilot started the autorotation maneuver, making the descent heading north and into the wind. On landing, the main rotor blades collided with the tail mast, causing the vertical stabilizer to detach and causing the aircraft to yaw 180 degrees before stopping.
The pilot was unhurt. The aircraft suffered significant damage.
It was determined by the CIAIAC that the 250W alternator was not capable of meeting the aircraft's electrical demand at peak demand. The day was hot (32º), which contributed to the electrical system being overloaded.
After 9 minutes and 20 seconds of flight, the battery dropped below 7 V, at which point the engine stopped due to lack of power supply to the aircraft ECU, which controls the injectors
Causes/contributing factors
It is considered that the probable cause of the accident was the incorrect performance of the autorotation maneuver due to an in-flight engine shutdown.
Accident investigation:
 |
|
Sources:
https://www.mitma.gob.es/organos-colegiados/ciaiac/ultraligeros-motorizados-ulm/2020/ulm-A0102020
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 30-Jul-2020 10:04 | harro | Added |
Corrections or additions? ... Edit this accident description
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