I have no idea? Dropped out of the sky. Was 39% battery left with 1300 feet to go. I don't know how to decipher the data..waiting for the pros.
This is one of those frustrating cases where the flight record doesn't show exactly what caused the incident.
It gives us enough info to eliminate most of the usual suspects.
The battery appears to be fine, no obstacles or wind to worry about..
The flight record just ends with the Phantom approaching home, at 376 ft and descending under control.
The two possibilities that come to mind are hitting something (a bird or a wire ??) and dislodging the battery or a random hardware problem that cut off the power.
To get to the bottom of this mystery, the Phantom will have to be recovered and the internal flight data may show more.
At the last recorded position, it was making 30 mph, so if it lost power and fell, the momentum would have carried it further along the same line.
If it carried on for more than 100 ft, it may be in a pond.
My rough arithmetic suggests it would have ended up close to the arrowhead above.
It's not possible to calculate exactly which side of the edge it would have landed.