After I found out the ESC deffection I try to check many parts.
I realize that radio controller also have problem.
Your customer service said thats my fault but I will ask anyway.
The thing is that when I point the lowest throttle on the radio controller it become 1020 value.
However If I change the yaw value little bit and put the lowest throttle vlaue it become 1000.
If I put on the disarm position it become 1020 value.
So how is it my fault about this malfunctioning radio controller which causes accident.
I put on the video for the provement.