Mavic Pro2 Falls from Sky

[IdahoJP]

My First time posting on this forum but I need to know what Happened. I did a small fight from my house had the drone in sight when two warnings popped up and the drone dropped like a rock onto the road. I know pilot error is most of crashes but I did nothing wrong that I can see. You tell Me. The link is enclosed.

DJI Flight Log Viewer - PhantomHelp.com

After looking at other post is over heating the cause?

 

[Cyberpower678]

A cursory glance at the data suggests this looks like aircraft failure. I haven't had a lot of time lately to do thorough analysis of flight data, so pinging @sar104 @BudWalker

 

[IdahoJP]

Thanks for looking into this for me. This is my 4th Dji drone I owned the one I hoped to replace the others now Just bummed. Hope DJI does the right thing. Hope they are open on Monday Labor day to get me started.

 

[Cyberpower678]

Thanks for looking into this for me. This is my 4th Dji drone I owned the one I hoped to replace the others now Just bummed. Hope DJI does the right thing. Hope they are open on Monday Labor day to get me started.

You can file an online repair request. You should get a label today that you can send off on Tuesday. But before that, you should have the other experts with time to spare confirm this was a manufacturing defect, so you know what to expect when you send it to DJI.

 

[Irish-apple]

first thing I seen is your battery at 48% / But I know nothing about these log files .. the dude @sar104 should be here soon and we can all bask in his awesomeness

 

[Fplvert]

Thanks for looking into this for me. This is my 4th Dji drone I owned the one I hoped to replace the others now Just bummed. Hope DJI does the right thing. Hope they are open on Monday Labor day to get me started.

Hey Bro, sorry about your bird. I’d be super bummed, too!
As fast as DJI cranks them out, they’re bound to have some failures. I hope they get you a new one soon.

 

[sar104]

Can you retrieve and post the DAT file from the mobile device? The log shows a sudden end, but there is an IMU switch that looks suspect shortly before that, followed by a gimbal error. Other than that there is nothing in the txt log that stands out as odd.

How to retrieve a V3.DAT from the tablet

The aircraft DAT files are available in the "Log Export" section of DJI Assistant, but appear to be encrypted - same as the MA.

 

[Drone Master]

first thing I seen is your battery at 48% / But I know nothing about these log files .. the dude @sar104 should be here soon and we can all bask in his awesomeness

Yeah, but his log stops at 28% battery. 30% is the default setting for RTH.
Looks to be some unusual deviance between cells. Possible battery failure or accidental CSC.

 

[Irish-apple]

Yeah, but his log stops at 28% battery. 30% is the default setting for RTH.
Looks to be some unusual deviance between cells. Possible battery failure or accidental CSC.

agreed but for a guy who states hes flown all the dji drones etc .. starting a brand new mavic 2 at 48% battery should know way way better .. definitely hope he gets it sorted or an answer but when he stated { This is my 4th Dji drone I owned the one I hoped to replace the others now Just bummed.} worried me as anyone with that much knowledge of drones and how they work should know .. and if you look at the map he flew a nice little distance .. look I hope he gets answers but would you fly it at 48% ?

 

[Cyberpower678]

Yeah, but his log stops at 28% battery. 30% is the default setting for RTH.
Looks to be some unusual deviance between cells. Possible battery failure or accidental CSC.

A CSC would've shown in the logs before it went down. The sticks were centered and the Mavic 2 was hovering at the time of the failure.

 

[sar104]

Yeah, but his log stops at 28% battery. 30% is the default setting for RTH.
Looks to be some unusual deviance between cells. Possible battery failure or accidental CSC.

Speculating without looking at the data is pointless. At the end of the log the smart RTH value was at 17% and the land value was at 12%. 30% is the default low battery warning, not the RTH value, which is calculated on the fly as a function of distance. Neither of those would have caused the log to end suddenly anyway. And there was no CSC at the end of the log - all sticks were centered.

 

[Cyberpower678]

agreed but for a guy who states hes flown all the dji drones etc .. starting a brand new mavic 2 at 48% battery should know way way better .. definitely hope he gets it sorted or an answer but when he stated { This is my 4th Dji drone I owned the one I hoped to replace the others now Just bummed.} worried me as anyone with that much knowledge of drones and how they work should know .. and if you look at the map he flew a nice little distance .. look I hope he gets answers but would you fly it at 48% ?

Yes, I've done it plenty of times when battery life was at a premium.

 

[Drone Master]

agreed but for a guy who states hes flown all the dji drones etc .. starting a brand new mavic 2 at 48% battery should know way way better .. definitely hope he gets it sorted or an answer but when he stated { This is my 4th Dji drone I owned the one I hoped to replace the others now Just bummed.} worried me as anyone with that much knowledge of drones and how they work should know .. and if you look at the map he flew a nice little distance .. look I hope he gets answers but would you fly it at 48% ?

No, never have started out if it’s less than 80%, unless for simple testing for only a minute or two.

 

[Drone Master]

Speculating without looking at the data is pointless. At the end of the log the smart RTH value was at 17% and the land value was at 12%. 30% is the default low battery warning, not the RTH value, which is calculated on the fly as a function of distance. Neither of those would have caused the log to end suddenly anyway. And there was no CSC at the end of the log - all sticks were centered.

Absolutely, we definitely need more data. Hopefully the OP can provide.

 

[sar104]

Absolutely, we definitely need more data. Hopefully the OP can provide.

Right - but my point was that you obviously didn't look at the data, otherwise you would not have made those comments.

 

[Just_nick]

agreed but for a guy who states hes flown all the dji drones etc .. starting a brand new mavic 2 at 48% battery should know way way better .. definitely hope he gets it sorted or an answer but when he stated { This is my 4th Dji drone I owned the one I hoped to replace the others now Just bummed.} worried me as anyone with that much knowledge of drones and how they work should know .. and if you look at the map he flew a nice little distance .. look I hope he gets answers but would you fly it at 48% ?

Doesn't matter, 48% battery should not matter in the slightest. It'd be a bad idea for a long flight, but it shouldn't make a difference for regular flight

 

[Drone Master]

Right - but my point was that you obviously didn't look at the data, otherwise you would not have made those comments.

I cannot see the whole log like you can. My screen is limited.

 

[sar104]

Doesn't matter, 48% battery should not matter in the slightest. It'd be a bad idea for a long flight, but it shouldn't make a difference for regular flight

Correct. The battery level and the cell voltages were unrelated to this incident.

 

[sar104]

I cannot see the whole log like you can. My screen is limited.

The log has 274 data columns and 3488 rows. I have to scroll to see them.

 

[Joola]

That’s for sharing the log. It’s weird the data just drops off that last line with no real warnings. I’m traveling and stuck on mobile so I can’t look at this too closely right now but am interested to hear more about this one.