ASN Wikibase Occurrence # 315426
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| Date: | Sunday 18 April 2021 |
| Time: | 04:50 |
| Type: | Parrot Anafi USA |
| Owner/operator: | Private |
| Registration: | unreg. |
| MSN: | PF728210AB1A000399 |
| Fatalities: | Fatalities: 0 / Occupants: 0 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | near Princes Risborough, Buckinghamshire -
 United Kingdom
|
| Phase: | En route |
| Nature: | Survey |
| Departure airport: | near Princes Risborough, Buckinghamshire |
| Investigating agency: | AAIB |
| Confidence Rating: |  Accident investigation report completed and information captured |
AAIB investigation to Parrot Anafi USA, (UAS registration n/a): Power loss in flight resulting in ground impact, near Princes Risborough, Buckinghamshire, 18 April 2021.
The unmanned aircraft (UA) was operating at 60 metres agl (above ground level) with an observer maintaining visual line of site and an operator controlling the aircraft and camera. The weather was overcast but with good visibility and low wind. The UA had been conducting a survey of nearby fields and woodland and had been flying for approximately 11 minutes. It was stable and hovering as the operator yawed the aircraft to pan the camera around. The controller suddenly lost connection with the UA and the tablet screen showing the camera picture displayed “white noise”. The operator noticed that the UA’s Wi-Fi signal had reduced from green to red but there was no other information displayed.
The observer watched as the UA pitched forwards and rapidly descended into the ground in nearby woodland. The aircraft was found 300 m away upside down. One rotor blade had snapped, a rotor arm had been dislodged, the rotor arms were unable to fold out and the battery had been released and was located next to the aircraft.
=Damage to airframe=
Per the AAIB Report "Damage to rotor blade, propeller arms, and battery locking mechanism"
Princes Risborough is a market town in Buckinghamshire, England, about 9 miles (14 km) south of Aylesbury and 8 miles (13 km) north west of High Wycombe. It lies at the foot of the Chiltern Hills, at the north end of a gap or pass through the Chilterns, the south end of which is at West Wycombe. The A4010 road follows this route from West Wycombe through the town and then on to Aylesbury.
Accident investigation:
 |
|
Sources:
1.AAIB Final Report: https://assets.publishing.service.gov.uk/media/6137863bd3bf7f05b3fbd7a3/Parrot_Anafi_USA_UAS_reg_na_09-21.pdf
2. https://www.bucksfreepress.co.uk/risborough/
3. https://en.wikipedia.org/wiki/Princes_Risborough
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 18-Jun-2023 19:20 | Dr. John Smith | Added |
| 18-Jun-2023 19:23 | harro | Updated |
Corrections or additions? ... Edit this accident description
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