Mavic Pro self Folded and Crashed

[sparktour]

Hi,
My Mavic pro crashed on the climbing process. However, the crash seems really weird as there's no obstacle on the way of my flight, the drone just started to spin itself and crash to ground. While checking the wreckage of the plan, I found that the right side arms of the drone are folded!
Could the reason for the crash be related to the defect of the arm to let it fold on air?

There are also some errors in the app log like "GPS Position NoMatch ","battery voltage abnormal" and fatal log in aircraft's log (can be found below): (Most of the critical issues came after the error message below at about 57s after taking off)

57.506 :   39739 [L-FDI][CTRL]: fault on , tilt_ctrl_fail
57.524 :   39740 [L-RC]craft ctrl failed!!!
57.686 :   39748 [L-FDI][CTRL]: fault off, tilt_ctrl_fail
59.545 :   39841 [L-RC]craft ctrl failed!!!
60.083 :   39868 [L-NS] [AHRS] gyro mag inconsist on
60.706 :   39899 [L-FDI][CTRL]: fault on , tilt_ctrl_fail
60.746 :   39901 [L-FDI][CTRL]: fault off, tilt_ctrl_fail
60.906 :   39909 [L-FDI][CTRL]: fault on , tilt_ctrl_fail
61.026 :   39915 [L-FDI][CTRL]: fault on , height_ctrl_fail
61.046 :   39916 [L-FDI][CTRL]: fault off, tilt_ctrl_fail
61.085 :   39918 [L-FDI][CTRL]: fault on , tilt_ctrl_fail
61.564 :   39942 [L-RC]craft ctrl failed!!!
63.584 :   40043 [L-RC]craft ctrl failed!!!
64.386 :   40083 [L-FDI][CTRL]: fault off, tilt_ctrl_fail
64.546 :   40091 [L-FDI][CTRL]: fault on , tilt_ctrl_fail
64.646 :   40096 [L-FDI][CTRL]: fault off, tilt_ctrl_fail
65.605 :   40144 [L-RC]craft ctrl failed!!!
65.925 :   40160 [L-FLYMODE][Ctrl<1>] REQ_RC_NORMAL ATTI_HOLD ctrl_gps_atti
66.446 :   40186 [L-FDI][CTRL]: fault off, head_ctrl_fail
66.986 :   40213 [L-FDI][CTRL]: fault on , head_ctrl_fail
67.046 :   40216 [L-FDI][CTRL]: fault off, head_ctrl_fail
67.286 :   40228 [L-FDI][CTRL]: fault on , head_ctrl_fail
67.406 :   40234 [L-FDI][CTRL]: fault off, head_ctrl_fail
67.624 :   40245 [L-RC]craft ctrl failed!!!
67.666 :   40247 [L-FDI][CTRL]: fault on , head_ctrl_fail
68.059 :   40266 [L-MIS]WP Mission: received idle vel cmd 10.000000 from app
68.060 :   40266 [L-MIS]WP Mission: ack idle vel 234 to app
68.746 :   40301 [L-FDI][CTRL]: fault off, head_ctrl_fail
69.006 :   40314 [L-FDI][CTRL]: fault on , head_ctrl_fail

There're also some figure and log below:
DJI App log: DJI Flight Log Viewer - PhantomHelp.com







figure from the DAT


folded arm after crashed

(At the time, i was using the "Pix4d Mapper"(3D modeling app) to automated control the drone, and its present is directly climbed to 150M to start the capture.)

Any help would be appreciated!

 

[Thomas B]

Likely just folded in the impact.

 

[Moose1967]

My guess is that prop failed on that arm - lets see what the experts tell you according to the logs.

 

[Fly Dawg]

@sparktour Certainly looks like a lost prop. Can you share the .dat?

 

[sparktour]

@sparktour Certainly looks like a lost prop. Can you share the .dat?

View attachment 90126

Sure, it could be retrieved here. <Link>

 

[sar104]

This incident was not caused by any problem with the motor arms. The aircraft lost the right rear prop, leading to loss of thrust (obviously), 100% motor demand, and rear right motor overspeed.



The loss of the CW rear right then resulted in an imbalance in angular momentum with two CCW motors and only one CW motor, leading to CW spin and a tumbling fall:

 

[Chapelhillcarrborofpv]

wow, I did not know it runs a flight log, how do you view it ?

 

[sirbadger]

wow, I did not know it runs a flight log, how do you view it ?

Mavic Flight Log Retrieval and Analysis Guide

With the introduction of the Mavic Mini there has been a noticeable uptick in the number of posts requesting help with lost or crashed aircraft. While there is plenty of help and advice available on this forum, and detailed guidance and options on several other websites, I thought that perhaps a...

mavicpilots.com

 

[sparktour]

This incident was not caused by any problem with the motor arms. The aircraft lost the right rear prop, leading to loss of thrust (obviously), 100% motor demand, and rear right motor overspeed.

View attachment 90168

The loss of the CW rear right then resulted in an imbalance in angular momentum with two CCW motors and only one CW motor, leading to CW spin and a tumbling fall:

View attachment 90169

Really thanks! Although unfortunately, the drone itself is out of warranty, so I may have to pay for the repair?.