ASN Wikibase Occurrence # 264854
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| Date: | Sunday 17 June 2018 |
| Time: | 05:45 UTC |
| Type: | DJI Phantom 4 Pro |
| Owner/operator: | Private |
| Registration: | Unregistered |
| MSN: | |
| Fatalities: | Fatalities: 0 / Occupants: 0 |
| Aircraft damage: | Substantial |
| Location: | Worcester, Worcestershire -
 United Kingdom
|
| Phase: | En route |
| Nature: | Survey |
| Departure airport: | Worcester, Worcestershire |
| Worcester, Worcestershire | |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
AAIB investigation to DJI Phantom 4 Pro, UAS, registration n/a: Loss of control in flight, Worcester, Worcestershire, 17 June 2018. The AAIB Final Report was published on 9 May 2019, and the following is an excerpt from it:
"The aircraft was being flown on a surveying task in a built-up area, for which the pilot had approval. It took off on its third flight of the day with the battery indicating 51% charge and 13 minutes and 17 seconds of flight time remaining.
After an uneventful few minutes, the enunciated flight mode, on the aircraft’s controller, changed from ‘gps’ to ‘landing’ without any warning or input by the pilot. This was followed by the following messages also being displayed on the controller:
‘Obstacle sensing will be disabled when aircraft is landing. Fly with caution.
Aircraft is close to home point. Initiate return to home will now trigger Auto Landing’
The aircraft then entered a hover. Despite several attempts by the pilot to take control of the aircraft, including selecting A [Attitude] Mode and selecting RTH [Return to Home], the aircraft continued to hover. The pilot then rebooted the manufacturer’s application on the monitor connected to the controller, but this had no effect. He then changed the monitor for a portable electronic device, but the aircraft continued to hover and not respond to any inputs.
The pilot then reconnected the monitor and ‘landing’ continued to be displayed. Shortly thereafter, having flown for about 6 minutes and 30 seconds, while it was in a hover, when the battery was indicting 11% and 2 minutes and 51 seconds of flight time remaining, the aircraft started to descend. As it did, it made contact with the side of a building and fell 30 ft. It came to rest on a flat roof, sustaining extensive damage to the aircraft".
Sources:
1. AAIB Final Report: https://assets.publishing.service.gov.uk/media/5f46774ae90e07298f464f63/DJI_Phantom_4_Pro_UAS_05-19.pdf
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 28-Jun-2021 20:26 | Dr. John Smith | Added |
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