Wachtberger
Captain
Flight distance : 261509 ft
Germany
Offline
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I won't be able to explain everything, but here are my observations. There was a very similar case recently, even in the same country. I still don't know if the regulations in this country allow flying over residential areas like this one, but two issues come along with doing it. First of all many potential sources for interference e.g. through other WiFi networks and impossible to fly in VLOS at all times. Thus connection losses are almost certain to happen as it also was the case here.
The first one occured at 1m 38.8s which triggered Auto RTH for Spark as it is expected to happen. I do not know what triggers the "Command Timeout" error but at 2m 5.5s RTH stopped (or was manually interrupted by pilot) and Spark proceeded flight with stable GPS link and RC connection.Starting from 2m 15s maximum permitted altitude was exeeded considerably and soon Sport Mode engaged. Spark was then flown to the maximum controlled distance of this flight which was 385 meters in a built up area. Yaw errors started at 3m 13.7s. At 3m 14.9s the first compass error occurred and Spark switched into ATTI mode. From this point onwards RTH was no longer an option, only manual flight could have brought it home. But due to the distance, extremely high altitude and lack of VLOS this was not really a very promising option either.
The flightrecord clearly shows that the Spark was carried away by the wind and distance further increased up to 402 meters. At 3m 37.3s GPS link was re-established, after another connection loss at 3m 59.5s Spark went again into Auto RTH and after new yaw errors back into ATTI mode at 4m 10.5s.
The flightrecord then ends at 4m 15.5s, probably due to RC connection loss. Since at that time it was at almost 156 meters altitude it is unlikely that it has crashed into something at that point.
I am also sorry about your loss but you should accept that unsuitable flight environment, lack of VLOS and excess of altitude have been major contributing factors for it.
I recommend opening a support case with DJI here https://www.dji.com/support but am not able to predict the outcome. |
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