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Spark fly away cases.How many of us had the experience
984 11 2018-8-14
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fans34ee8814
lvl.2
Flight distance : 4678 ft
United Kingdom
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Im done with being patient.My Dji spark flew away on the 11th flight after app blocks,dji saying it is misoperation.how many of you experienced that and what was the outcome,and at the end of the flight its triggered emergency landing but the drone is flying with 19mph so i need some help to hear other users cases.
Hope you are gonna help me guys.
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2018-8-14
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Jos A
Captain
Flight distance : 11588 ft
Netherlands
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What I see is normal behaviour,your canceld autolanding with a low battery. At the end your spark try to stay horizontal but cannot due to low battery power and tried to get more speed.Question why are you going so high with only 40 % battery?

2018-8-14
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Chuck101
Second Officer
Flight distance : 27815 ft
United States
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Jos A Posted at 2018-8-14 03:43
What I see is normal behaviour

Mode: Auto Landing
Altitude: 57 ft and increasing
Speed: 19 mph and increasing
Distance from home: 319 ft and going farther away

No, that is NOT normal.
2018-8-14
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Jos A
Captain
Flight distance : 11588 ft
Netherlands
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Chuck101 Posted at 2018-8-14 03:51
Mode: Auto Landing
Altitude: 57 ft and increasing
Speed: 19 mph and increasing

that caused by tap to fly, but I agree the last to recorded logs are strange, when autolanding is active a increase of altitude is shown but cannot be true with low battery of 5 %
2018-8-14
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KlooGee
Captain
Flight distance : 14851519 ft
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United States
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Here is my analysis of your log file from your other thread you started a few days ago:  https://forum.dji.com/forum.php? ... =161299&pid=1510896

Firstly, I'm very sorry to hear of your troubles.  

I obviously wasn't there, so I can't make any comments or assumptions on what you saw and did.  I can only comment on what I see in the data in the logs that are recorded.  

Firstly, the last location recorded in the log files is at:  51.53258182,   -2.53514453
However, as of the last log entry, it was moving in an easterly direction moving away from the home point at about 19mph (8.5m/s) due to pilot stick inputs.  Unfortunately, this last location is also right above a bunch of trees and right next to a busy highway.  I think finding it might be a bit of a challenge.

Again, I wasn't there, so I can only comment on what I see in the logs...  When I've investigated other incidents, when the app crashes, the log ends.  That doesn't seem to the be the case here.  In this case, there appears to be valid logging for most of the flight right up until near the end.  
In the logs, it looks like the pilot is in full control of the aircraft.  All stick inputs from the pilot resulting in matching coordinated movements of the aircraft.  Based on what can be seen in the logs, I'm not surprised to see DJI's response to your case.  Unless you have other evidence to provide for them, I highly doubt they would decide to cover this under warranty.  
I know it is difficult to do, but unfortunately you also have to look at the situation from DJI's perspective.  If you were running a business, I think there is a good chance you would very likely come to the same conclusion they have with the evidence that is available.  From a business's perspective, they can only make decisions like this based on evidence.  They would be out of business in no time if they didn't.  

Some recommendations based on what I see:
  • Always use a screen recorder on your phone during flights so that you have evidence of what you experienced and were seeing during the flight.  In a situation like this, if the app did crash, then you would have video evidence of this to provide to DJI to counter what is seen in the log files.
  • It generally is not a good idea to take off for a new flight with only 40% remaining on a battery.  This is especially important on the smaller drones with limited battery life like the Mavic Air.  The time remaining from 40% until it goes into critical failsafe mode and tries to autoland is surprisingly quick.  Unless you are very experienced, this can make for a challenging situation.
  • As soon as the battery gets to 30%, start bringing it back manually (don't RTH) ASAP so that you don't get into a bad situation.


I wish you the best of luck moving forward and hope you have another drone soon and have many fun and safe flights ahead!
2018-8-14
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KlooGee
Captain
Flight distance : 14851519 ft
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United States
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Chuck101 Posted at 2018-8-14 03:51
Mode: Auto Landing
Altitude: 57 ft and increasing
Speed: 19 mph and increasing

All of these things you pointed out have a very easy answer in the logs.  The aircraft was responding to the stick input from the pilot.  
2018-8-14
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fans34ee8814
lvl.2
Flight distance : 4678 ft
United Kingdom
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Im using the RC at the moment.So im doing all this and trying to stop it .the app is blocked(which of course i cant prove it to dji),as you can see on the snapshot when you press the rc joystick to the opposite direction it should override the tap fly mode,(failsafe as they call it)and cancel it,so thats one of three options.the other one is to press the X button on the app (but it is blocked so i cant press it,and unlucky me i cant prove it) the third option is The pause button on the RC and i was pressing both of em RTH and Pause Button so as i cant see it in the flight records,idk why.

And last i dont think anyone will fly their brand new drone into the unknown with purpose and then hope get a replacement.
And they give you five screenshots from the flight report,telling you that its misoperation so it is pilot mistake.Okay even if thats the conclusion i think you need to get the full report through out the flight ,fully examined with explanation so the users can do their own investigation,and why is Dat files about and why the user cant see whats in it.You just cant fight the system especially.they can tell you whatever they want to.
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2018-8-14
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KlooGee
Captain
Flight distance : 14851519 ft
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fans34ee8814 Posted at 2018-8-14 06:20
Im using the RC at the moment.So im doing all this and trying to stop it .the app is blocked(which of course i cant prove it to dji),as you can see on the snapshot when you press the rc joystick to the opposite direction it should override the tap fly mode,(failsafe as they call it)and cancel it,so thats one of three options.the other one is to press the X button on the app (but it is blocked so i cant press it,and unlucky me i cant prove it) the third option is The pause button on the RC and i was pressing both of em RTH and Pause Button so as i cant see it in the flight records,idk why.

And last i dont think anyone will fly their brand new drone into the unknown with purpose and then hope get a replacement.

When you say "the app is blocked", can be more detailed about you what you mean?  I'm not sure I understand.  Do you get an error message?  Does it freeze? Does it crash and go away?
2018-8-14
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fans34ee8814
lvl.2
Flight distance : 4678 ft
United Kingdom
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KlooGee Posted at 2018-8-14 08:18
When you say "the app is blocked", can be more detailed about you what you mean?  I'm not sure I understand.  Do you get an error message?  Does it freeze? Does it crash and go away?

Freeze,like a snapshot and i didnt try cancel it cuz i didnt know what really is gonna happen if i do.
2018-8-14
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DJI Diana
Administrator
Flight distance : 2408 ft

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Hi, I am sorry for the trouble. If the unit is under warranty period, we'll arrange data analysis and offer you a proper solution according to the result. If you encounter any difficulties during the progress, please kindly contact us with your case number, we'd like to help.
2018-8-14
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fans34ee8814
lvl.2
Flight distance : 4678 ft
United Kingdom
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DJI Diana Posted at 2018-8-14 09:00
Hi, I am sorry for the trouble. If the unit is under warranty period, we'll arrange data analysis and offer you a proper solution according to the result. If you encounter any difficulties during the progress, please kindly contact us with your case number, we'd like to help.

Well i have a case already,and the outcome is misoperation(pilot fault).So pretty much you already helped me out.
Thank you
2018-8-14
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DJI Diana
Administrator
Flight distance : 2408 ft

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fans34ee8814 Posted at 2018-8-14 09:17
Well i have a case already,and the outcome is misoperation(pilot fault).So pretty much you already helped me out.
Thank you

Hi. If you have any other concern please feel free to post it here for further help. Thank you.
2018-8-14
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