DJI Drone Help Forum

Phantom 3 Catastrophic Failure - Fell in the sea!

#1

Id had the drone for about a month with 7.5 hours total flight time, everything seemed ok, id flown in the same place earlier that day with no problems at all. Everything was charged and ready to go. didnt predict such a catastrophic failure!

Could someone please have a look and try to figure out what went wrong?

I just need to know if it was my fault or has the drone malfunctioned?

https://www.phantomhelp.com/logviewer/SM6TPFFFNX0JO5Z59UNX/

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#2

@mattytodd…At ~58 seconds, it appears that you may have lost a prop. Ejected, broken or otherwise undetermined. There is really no way to be certain without the aircraft data, which obviously and unfortunately you won’t be able to retrieve. A bird strike is also a possibility, though unlikely.

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#3

Thanks for the reply I had been thinking all day that a prop could have been the cause. oh well…

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#4

Fly_dawg; for my own knowledge can you share please how you determined prop issue. NOT saying you are wrong. Simply for my own learning. Also how did you get that above graph?

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#5

@DeputyDawg…As in the above graph, the sudden change in pitch and roll values at ~58 seconds are consistent with the indications of a lost prop. As mentioned however, the aircraft data would provide a better analysis, but in this instance this is what we have.
As for the graphs, I use other software to plot these from the .csv data files. Most often I use @BudWalker CSV View for these, which is what was used in this plot. This is available here: Datcon/CSV View

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#6

So sorry for your loss. Wondering how your pre-flight check went. I know that the screw-on type props can cause real problems if not secured real good, especially when accending or decending and stopping or slowing down quickly, but as the vertical speed isn’t shown, this may or not been the case. I believe that is the most common problem with those props, IMHO.Were the antennas perpendicular with the drone so as to give the best signal? If pre-flight check went well, then like was mentioned by Fly Dawg, possibly a prop failure or bird strike could have occured. Going down over the “cliff” is a possible place for nesting seabirds, just a possibility. Wish we could all be more helpful. Again, sorry for your loss.

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#7

@mnm…There were no throttle inputs immediately prior to the incident, therefore the vertical speed remained the same until after the event. More probable was the full back elevator release immediately prior. You are correct on the prop installation however.

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