Mavic Pro crash analyze

Discussion in 'Mavic Pro Help' started by edelf, Jan 8, 2017.

  1. edelf

    edelf Member

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    Hello,

    Yesterday morning 2017-01-07 around 09:15 my Mavic crashed.

    Here a link with the logfile from this flight. (293 MB)

    Dropbox - DJI_ASSISTANT_EXPORT_FILE_2017-01-08_19-45-02.DAT

    I can replay this flight on my DJI Go4 app, but I want a better understanding of the cause. I was 30 m from the homepoint.
    I climbed from 39 m to 70 and to 110 m and got a warning and it started drifting. It drifted away, descended and crashed through some trees on to the ground.

    Could someone do me a favour and analyze this log file.
     
  2. f3honda4me

    f3honda4me Well-Known Member

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    I'm not totally sure, I see some weird errors in the log file. @BudWalker might know more, but this looks to me like some kind of hardware issue.
     
  3. edelf

    edelf Member

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    messages like: Overcurrent during discharge ?
     
  4. f3honda4me

    f3honda4me Well-Known Member

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    No
     
  5. f3honda4me

    f3honda4me Well-Known Member

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  6. edelf

    edelf Member

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    I hasve troubles locating this file on my Ipad Mini 2. ( ios 10.2). I don't see this file on Itunes. I will keep trying. Anyone Ipad tips ?
     
  7. edelf

    edelf Member

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    I managed to extract the .txt file. I can view the entire flight in Healthydrones now. Please have a look.
     

    Attached Files:

  8. Anthony

    Anthony Well-Known Member

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  9. Anthony

    Anthony Well-Known Member

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    The first point is you are already airborne before your home point has updated ...... and lots of gps errors.

    Is your drone damaged ?
     
    #9 Anthony, Jan 9, 2017
    Last edited: Jan 9, 2017
  10. edelf

    edelf Member

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    It dropped uncontrollable out of the air. So yes, gimbal wrecked, 4 props, 1 prop-motor connection, and smoke out of the copter.
     
  11. Anthony

    Anthony Well-Known Member

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    Ok raise a support ticket with DJI and load your flight details as you can see this in the log file they will look at it and confirm a drone issue and you should get a free repair....

    Sent from my SM-G925F using MavicPilots mobile app
     
  12. f3honda4me

    f3honda4me Well-Known Member

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    After some confirmation by @BudWalker we both agree there seem to be hardware issues with your drone, and were the cause of the crash. During the flight you had a few of these:
    278.347 : 1673528830 : 18376 [L-FMU/LED]action changed. aircraft install warning!:mass center install err(2)

    Copying from bud:

    405 no response to throttle input for 7 secs.
    418 LB and RF motor speeds begin to get funny
    418.624 : 2304777509 : 25390 [L-RC]craft ctrl failed!!!
    427 LB motorLoad gets really noisy
    436 RF, LB, RB motors quit or get really slow
    LF continues with higher load
    436.342 : 2384507603 : 26276 [L-FMU/MOTOR]fault on , esc(1) is stall
    436 might be where it hit the tree, but that's 78 meters high.
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]

    And then crash at 440 seconds into the flight:

    440.047 : 2401179064 : 26461 [L-FDI][CTRL]: fault on , impact_in_air

    Contact DJI, send them your log files. I'm guessing this will be a warranty issue.
     
  13. edelf

    edelf Member

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    Thank you for your time. I will issue a repair with DJI.
     
  14. BudWalker

    BudWalker Well-Known Member

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    Thank you for the .txt. The warning that you referred to; was that the "Overcurrent during discharge" in post #3? That occurred immediately after the ascent to 110 m with throttle maxed. The current was then reduced and the incident/drifting didn't start for another 10 secs or so. It would seem unlikely this was the cause of the incident.

    BTW, having the .txt and the "Overcurrent during discharge" message will help with finding more stuff in the .DAT.
     
  15. edelf

    edelf Member

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    you are right with that warning, when that occurred I checked the battery status on my DJI Go4 app. Left two cells were green, right cel was orange.
     
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  16. BudWalker

    BudWalker Well-Known Member

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    Was there anything different about the left front prop or motor? Was the prop attached?
     
  17. edelf

    edelf Member

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    Both front left front right props were only slight damaged. Rear left / rear right are broken, but were found at place of impact.
     
  18. john waddington

    john waddington New Member

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  19. BudWalker

    BudWalker Well-Known Member

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    I should know better but I'm going to predict that the right front motor or esc developed a short and propulsion was lost. At 435 the voltage dropped monetarily on that motor and then thereafter was higher than the other motors. The speed dropped to 0 on that motor for the remainder of the flight. The AC began CCW spinning which is consistent with lost propulsion on either the right front or left back.
    upload_2017-1-11_16-40-21.png
    upload_2017-1-11_16-40-26.png
    upload_2017-1-11_16-40-33.png
     
  20. iSilentP

    iSilentP Member

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    I have a Mavic Pro that is also smoking as soon as try to turn on battery. I would like to connect to pc and get flight logs off the drone. How did you get the logs off from it. As soon as battery tries to come on, I hear a popping sound and then the smoke comes. Unable to connect to turn it on to connect to PC.
     
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