2 days ago I was flying my Spark, conected to my RC with Wi-Fi with a "Weak Transmission Signal"  only with my drone in a altitude of  20 mts and a distance of 50mts. Sundely I had the "Strong magnetic field interference" and it went to "Atti mode" and I lost all control with my Spark. It crash with a tree and luckyly the only damage was a broken propeller.
Once in my how wanted to see the  flight data, I used a fully loaded batery but DJI assistant just keep "loading" until batery went discharged and never show anything.


other things
- I always fly in opend field, with no FI-Wi signals everywhere (with luck weak phone and 3G signal)
- Away from electric lines
- Never had that issue with OTG cable (actually I had +100 mts altutide and 300 mts away with a excellent video signal in my phone)(I know you disable it in last upgrade)
- With the new app version 4.1.18 I cannot connect my phone to my RC when it has 3G/4G connection, I must disconect internet, so I don't have the map in the GPS. I just have a blue dot in a white screen with some chinase words

Sorry bad english.

With DJI Assistant you can only export your flight data for making it available to DJI for analysis. If you want to review your flight including the rror messages you can review it on your DJI GO 4 App under the menu "Flightrecords" by clicking on the individual records or you upload your flight record (they are in the DJI subfolder on your mobile device) here: http://www.phantomhelp.com/LogViewer/Upload/
If you wish us to provide some feedback to you on what has happened you may share the link with us after upload.

Changing to Atti mode could be for a reason and losing control could be for an other.

The first, could be because of normal drifting by the wind.

The second, is a real problem that you must concern about.


Edit: The first related to the crash.

Hi Sir, it's lucky to get back the drone. Have you checked the performance after changing the propellers? Is there any warning message in APP?

Ahmed Hussain Posted at 2017-12-14 09:45
Changing to Atti mode could be for a reason and losing control could be for an other.

The first, could be because of normal drifting by the wind.

You always have control in Atti mode your Aircraft will respond correctly to all stick movements, it is a much more difficult form of flying and with wind can be very difficult.

There is a very short period when your compass becomes disconcerted in gps mode your aircraft will out of control it’s usually about 2 seconds until Aircraft drops gps and reverts to Atti mode.

hallmark007 Posted at 2017-12-17 03:21
You always have control in Atti mode your Aircraft will respond correctly to all stick movements, it is a much more difficult form of flying and with wind can be very difficult.

There is a very short period when your compass becomes disconcerted in gps mode your aircraft will out of control it’s usually about 2 seconds until Aircraft drops gps and reverts to Atti mode.

Perhaps the difficulties that faced the pilot made him think he was losing the control as he said.

Ahmed Hussain Posted at 2017-12-17 08:08
Perhaps the difficulties that faced the pilot made him think he was losing the control as he said.

If you not used to it that’s exactly what happens.

DJI Susan Posted at 2017-12-17 00:50
Hi Sir, it's lucky to get back the drone. Have you checked the performance after changing the propellers? Is there any warning message in APP?

All is ok,

djiuser_AkPEPtl Posted at 2017-12-24 07:42
All is ok,

Thanks for getting back to us. Feel free to contact us if you need further assistance, we'll be here.