I have recently started using Drone Deploy with my Phantom 3 Professional. I have flown 2 Drone Deploy missions with good results, everything worked well and I had no issues. I started the third mission, (multi battery mission) once the first battery reached 30%, I pressed return home, landed and fitted a fresh battery. I then resumed the mission with everything going as expected. I pressed return to home at 40% to allow extra for the return flight against the wind. At this point the Phantom swung out of control and before I could work out what was happening, the Phantom crashed. It is now a complete write off with the camera destroyed and the airframe severely damaged. The main details are:
• Return home pressed in app at 40% battery capacity
• Wind speed: Northerly 10-15 knots (Checked with anemometer before flight)
• Transmitter switch in ‘F’ position
• Fingers off sticks for the whole flight
• Transmitter firmware up to date (updated last week)
• All propellers were on the Phantom after the crash
• Using iOS iPad Mini, wifi model ME279X/A Version 9.3.5
• No cellular or wifi connection (same as other missions)
• 50m elevation when return home pressed
• 275m from home when return to home pressed
The Phantom and Drone Deploy had been extremely reliable up until this point but I need to work out the root cause of this before I can do any more missions. Can anyone please help me to shed some light on why this has happened. Thank you!