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| Date: | Sunday 30 June 2024 |
| Time: | |
| Type: | LIAZ SkySpotter 152A |
| Owner/operator: | |
| Registration: | |
| MSN: | |
| Fatalities: | Fatalities: 0 / Occupants: 0 |
| Other fatalities: | 0 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | SW of Boreček -
 Czechia
|
| Phase: | En route |
| Nature: | Survey |
| Departure airport: | |
| Investigating agency: | UZPLN |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
The pilot of the GCS (Ground Control Station) unmanned helicopter (UAV) completed a radiation measurement activity at the defence area near the SLZ Hradčany area and on the instruction of the detector operator moved the UAV over the adjacent clearing, where it waited. The UAV was connected to the GCS by datalink. The entire flight was performed in line-of-sight. A temporary loss of signal occurred between the GCS and the UAV and unpredictably an automatic switch to manual control (set in neutral, resulting in loss of rotor power).
Due to the UAV being approximately 50 m above the ground and the rapid sequence of events, the pilot did not have the opportunity to take over the manual control. The UAV rolled over and caught the rotor on the ground when landing on rough terrain (piles of branches).
Sources:
https://uzpln.cz/pdf/20240719131933.pdf
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 12-Aug-2024 06:51 | ASN | Added |
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