"Kiwi, your investigation is excellent! Pity that it's not easy to come to a final conclusion. Anyway now that frame is broken, i've already put most of the electronics on another frame, an Y6, motors and escs are new but exactely of the same kind as…"

"Yes, the gopro is on a gimbal, i also noticed the noise reduction indicating lack of thrust... I will check the power distribution, but it is made with heavy gauge wires and good bullet connectors, i don't think that is the problem, plus it should…"

"The pixhawk configuration is for standard quad, so motors 1 and 4 are on the right side of the frame.
As you can see from the movie of the crash, the roll is to the left, so you're right saying that it's like the motors on the left failed, what's…"

"No, in the area of the crash there isn't any radio tower..."

"Hi Kiwi, thank you for spending time analyzing my crash... Yes, RC2 is elevator (pitch).
The reason the flight mode passes through sport mode before alt hold is that i configured two 3 pos switches of my taranis for the mode change, and to give time…"

"For sure not at close distance, also on google maps i can't see any in the area, do u think those antennas could interfere with the pixhawk? If so why would it do that at the moment of the flight mode switch?"

"Don't understand what you mean..."

"Motors are Sunnysky V3508 580kv and ESCs are Afro 30 amp."

"FW is the latest, 3.1.5, I can exclude prop issue, about motor and esc i must check, but it's not likely, the drone rolled over exactely when i switched to alt hold, till that moment it was flying nicely as always."

"Anybody that can give me suggestions?"

"I usually take out the Sd card from the pixhawk, insert it in my computer and download all the .bin files, then in APM planner, under the graphs tab, i use the load log file button, it works flawlessly and i can see all the graphs of the data.
My…"

"No... actually i also use APM planner and the latest version. I selected pos hold mode from the drop down list, but i cannot be sure about what it actually wrote in the software."

"OK, thank you for the hint... so this could have caused the crash? But if so, how is it possible that on mission planner it is actually possible to select this flight mode from the flight modes tab?"