Hey everyone,
I'm really disappointed and need some advice. Last weekend, I took my Avata 2 for a flight for the first time and everything was going great. Signal strength was solid and I even got some amazing views at my farm and also flying over a lake. But then, out of nowhere, the drone started to wobble and within ten seconds, it completely lost signal and crashed into the lake!

Despite trying my best, the lake is way too deep to recover it. Has anyone else experienced this? I need to get a replacement in India, has anyone got the replacement from DJI for similar issue. Any tips on how to handle this situation with the DJI would be super helpful!__PRESENT
https://youtube.com/shorts/pOyJlsCD3xE?feature=share__PRESENT__PRESENT

Download the .txt flight logs from the goggles to a phone that has the fly app installed on it.
Connect the phone to a computer and copy or move  the logs to computer via USB.
Upload the .txt flight log to
https://www.phantomhelp.com/logviewer/upload/
And post the URL here.

Sandeepnataraju Posted at 7-10 01:42
Despite trying my best, the lake is way too deep to recover it. Has anyone else experienced this? I need to get a replacement in India, has anyone got the replacement from DJI for similar issue. Any tips on how to handle this situation with the DJI would be super helpful!__PRESENT
https://youtube.com/shorts/pOyJlsCD3xE?feature=share__PRESENT__PRESENT

Something similar happened to me in manual mode, but I was not going fast, just returning home and it lost signal and crashed. But dji replaced it for free

In your video it looks like you are getting away fast in downward angle, how was the signal before losing it?

If you don't have a video recording of the flight, there is another possibility.

In the goggles there is a video recording of the last few seconds of the flight . You can see what the messages were.

How far away were you from the drone when this happened?

Hi there,

We are truly sorry for the inconvenience you are experiencing.

If your aircraft cannot be found, you can report a flyaway case via Flyaway Service . After successful registration, a DJI customer service agent will contact you and communicate with the service solution.

I hope this information has helped to clarify your inquiries. If you have any other questions, kindly let us know. Thank You!

Sandeepnataraju Posted at 7-10 01:42
Despite trying my best, the lake is way too deep to recover it. Has anyone else experienced this? I need to get a replacement in India, has anyone got the replacement from DJI for similar issue. Any tips on how to handle this situation with the DJI would be super helpful!__PRESENT
https://youtube.com/shorts/pOyJlsCD3xE?feature=share__PRESENT__PRESENT

Hi there,

According to India Import Policy, Drones are 'prohibited' except for R&D and defense use. There are no DJI Authorized Retail Stores in India to sell drones. So we cannot provide aftersales services for you. Sorry for the inconvenience caused and your understanding is highly appreciated.

I hope this information has helped to clarify your inquiries. If you have any other questions, kindly let us know. Thank You!

Mark Guille Posted at 7-10 13:45
How far away were you from the drone when this happened?

I am atleast a KM away from the drone

vid3 Posted at 7-10 05:38
If you don't have a video recording of the flight, there is another possibility.

In the goggles there is a video recording of the last few seconds of the flight . You can see what the messages were.

I couldnt import the recording from the Googles, hence recorded via phone. Below is the link

https://youtube.com/shorts/pOyJlsCD3xE?feature=share

eried Posted at 7-10 04:00
Something similar happened to me in manual mode, but I was not going fast, just returning home and it lost signal and crashed. But dji replaced it for free  

In your video it looks like you are getting away fast in downward angle, how was the signal before losing it?

I tried the same much lower, there was no issues, however this particular flight, I just lost signal
I had good signal before losing. My other question is, in case the signal is lost, drone was supposed to return to home. It didnt do that

DJI Natalia Posted at 7-10 23:20
Hi there,

According to India Import Policy, Drones are 'prohibited' except for R&D and defense use. There are no DJI Authorized Retail Stores in India to sell drones. So we cannot provide aftersales services for you. Sorry for the inconvenience caused and your understanding is highly appreciated.

I understand drone import is prohibited and you dont have any DJI support in India, I need a replacement drone to US address not to India address

Sandeepnataraju Posted at 7-16 00:14
I couldnt import the recording from the Googles, hence recorded via phone. Below is the link

https://youtube.com/shorts/pOyJlsCD3xE?feature=share

You could perhaps post  the .txt flight log ?

Sean-bumble-bee Posted at 7-16 00:21
You could perhaps post  the .txt flight log ?

I will do that tonight/tomorrow, I am not carrying the Goggles with me.

Sandeepnataraju Posted at 7-16 00:21
I understand drone import is prohibited and you dont have any DJI support in India, I need a replacement drone to US address not to India address

Hi there,

In that case you can report a flyaway case as mentioned and provided in 8#

I hope this information has helped to clarify your inquiries. If you have any other questions, kindly let us know. Thank You!

Sandeepnataraju Posted at 7-16 00:27
I will do that tonight/tomorrow, I am not carrying the Goggles with me.

That would be good, thank you.

You will need to download the logs from the goggles to a phone which has the FLY app installed on it. Then perhaps from the phone to a computer. ENSURE that ''syncing'' on the phone is switched off, in fact I would switch the phone's wifi and bluetooth etc. off before you coonnect it to the goggles and disconnect it from the goggles before you switch the phones wifi back on.
Syncing might delete the DATs mentiond in the third paragraph of this post but NOT the DAT/s mentioned in the fourth paragraph.. If so, once they are gone .... they are gone forever.

The .txt file you are looking for will have a name like ''DJIFlightRecord_YYYY-MM-DD_[hh-mm-ss].txt and will be found on the phone in a folder that probably has the name FlightRecord. Assuming you can find the .txt flight log upload it to https://www.phantomhelp.com/LogViewer/Upload/ and post the resulting URL here.

In 'FlightRecord' you might also see a folder named MCDatFlightRecords, if so in that folder you might find .DAT flight logs. If you see one with a similar date/time stamp to the .txt flight record could you upload that .DAT to a file hosting website, make its page public and post its URL here, there is a slim chance the DAT might be processable/readable.

I think I have read that the DAT that DJI might want is obtained by connecting the goggles to a computer that is running the appropriate Assistant 2 software but that's a vague recollection and could well be wrong.

So here is the latest update, gave all the relevant info to DJI Support, filed a Fly Away report, the team asked to load my flight records onto app, said they will do data analysis.

Then the analysis come out as
'Flight Time T=05:29, Relative Height H=2.4m, Distance to Home Point D=220.8m, the aircraft tilted 49.9 degrees forward and the pilot pushed up the throttle stick, the aircraft flew forward at 14m/s and descended at 2.9m/s, then it crashed with the obstacle;' I have posted the video of 30 seconds before I lost signal, where in the world the customer support saw, it crashed with the obstacle?

While I have replied to them saying I am not accepting this analysis, how to get this around this issue. It is clearly DJI is trying avoid giving me a replacement

Help!!!

Sandeepnataraju Posted at 7-19 02:18
Help!!!

Post the flight logs ............... as you said you would do on the 16th/17th
UNTIL you do then we have NO information.

Sean-bumble-bee Posted at 7-16 01:49
That would be good, thank you.

You will need to download the logs from the goggles to a phone which has the FLY app installed on it. Then perhaps from the phone to a computer. ENSURE that ''syncing'' on the phone is switched off, in fact I would switch the phone's wifi and bluetooth etc. off before you coonnect it to the goggles and disconnect it from the goggles before you switch the phones wifi back on.

https://www.phantomhelp.com/logviewer/UGOEUHQYPSH3OM1IBO5IX0VCWLSW6FP7

Couldnt figure out the DAT file with the right time stamp

Oh, what sort of controller was this flown with ?
I am wondering if it was a motion controller ?
With regards to the DAT do you see one that contains the string FLY013 ?
If they are named in the same way as FPV DATs than I recollect FPV DATs contain the following groups
FLYxyz and
YYYYMMDDhhmmss and
another 3 digit number
but I can't remember the order of those groups.

Sandeepnataraju Posted at 7-19 13:39
https://www.phantomhelp.com/logviewer/UGOEUHQYPSH3OM1IBO5IX0VCWLSW6FP7

Couldnt figure out the DAT file with the right time stamp

In what follows I think you were using a motion controller and I am not certain that I am reading the charts correctly and could be wrong ........ but I think
"Throttle" controls the drone's speed, ( the trigger on the motion controller with 1204 being neutral )
"Elevator" (1023 seems to be neutrsl ), ( tipping the motion-controller downwards/forwards or upwards/backwards ) in conjuction with the throttle controls the climb/decent rate. At neutral throttle ( 1204 )  the elevator would have no effect on the drone's height but when forward throttle is given the drone descends or climbs respectively.

It looks to me as if at 320 seconds you released the throttle which went to neutral, you had the motion controller tipped slightly upwards but your were rotating it forwards. From around 320.9 sec it was pointing increasingly downwards/forwards reaching a maximum forward tilt at 323.89sec.
At 323 you had started to squeeze the throttle again and the drone began to accelerate forwards at 323.4sec.
The forward tilt of the motion-controller coupled with squeezing of the throttle caused the drone to fly forwards and descend.
You might have realised that the drone was descending and started to rotate the motion-controller backwards but didn't react quickly enough.
At the end of the log the drone was at an indicated height of 4.2ft (barometer ) and descending at 9.5ft/s.
Sorry but it looks to me like you flew it into the ground.

I must stress this is the first time I have looked at what I think was a motion-controller controlled flight so I could well be mistaken.
I think it is a motion controller flight because the 'stick movements' don't make sense to me if it was a normal controller with two joysticks.

If JJB* doesn't turn up I would suggest you post the log over in Mavicpilots
https://mavicpilots.com/forums/crash-flyaway-assistance.85/
where there are guys who are much better than me with logs and there might well be some who are familiar with the Avata 2.

The attached plots are produced by processing the PH csv with CsvView.
https://datfile.net/CsvView/downloads.html

Oh! I got the same technical problem! And my Avata 2 felt in the lake too, but it was at 40-50m from me only.
Everything was perfect untill the picture at the goggles frezzed and i heard water splash after a second.
My friend was diving 2 hours around last gps coordinates, but the water so deep and blury - it's still there.
I get my logs and video already, but can't post the urls by rules of the forum.
There are drive.google.com/drive/folders/1MRFc6lzAtefH2XfjqXjjizBAnMAQr2N2
You can use this identificator at phantomhelp.com/logviewer/QP61F5K3L1ZR99VO7YN5IOPISVAKR2JC

I'm from Russia, but i've bought the dron in Indonesia.
I have attached a receipt for the purchase of a drone in a Bali, Indonesia store.

PalAlex Posted at 7-20 06:09
Oh! I got the same technical problem! And my Avata 2 felt in the lake too, but it was at 40-50m from me only.
Everything was perfect untill the picture at the goggles frezzed and i heard water splash after a second.
My friend was diving 2 hours around last gps coordinates, but the water so deep and blury - it's still there.

If you can, can you find the DAT, whose name might contain FLY032 and upload it to the google drive account?
If it can be read with CssvView etc, it would be interesting to see the motor rpm.

Sean-bumble-bee Posted at 7-19 16:02
In what follows I think you were using a motion controller and I am not certain that I am reading the charts correctly and could be wrong ........ but I think
"Throttle" controls the drone's speed, ( the trigger on the motion controller with 1204 being neutral )
"Elevator" (1023 seems to be neutrsl ), ( tipping the motion-controller downwards/forwards or upwards/backwards ) in conjuction with the throttle controls the climb/decent rate. At neutral throttle ( 1204 )  the elevator would have no effect on the drone's height but when forward throttle is given the drone descends or climbs respectively.

Thank you for taking time and giving a detailed analysis.

Few pointers

1. Motion controller was used for this drone
2. I did press Throttle and had the motion controller downward from the height to get a good clip
3. You do mention that I flew it ground, thats where I disagree. I lost contact of the drone, or the visual from my goggles (one of it) as I didnt intend to go so low.
4. The last 30 secs of the recording from Goggles (posted as a link earlier) stops while the drone is in the air and well above the water, thats where I lost visual/contact and the drone

I am still trying to work with DJI, but it is frustrating to see that for no fault of mine, this is getting dragged

Sandeepnataraju Posted at 7-22 01:17
Thank you for taking time and giving a detailed analysis.

Few pointers

With regards to 3 )
then I would suggest that you post the log and the phantom help URL over on
https://mavicpilots.com/forums/crash-flyaway-assistance.85/
along with your story and that you include the following in the text of the post
@BudWalker @msinger @sar104 @slup
They are much better log readers than me and the above text will tell them that they have been mentioned in a post.
I think you should be able to get the video off the goggles somehow but you will have to google that, assuming you succeed I would post that video in your post rather than the phone captured view of the goggles.

Attached is another set of plots for you to consider.
The marker/vertical_black_line is placed at what I think is the 'stationary' wobble shown in the video around 26 seconds, I think the video ends around 33 second, so 7 and a bit seconds later. The log ends  8.6 seconds with the drone descending during the time that is not recorded in the video.

How high would you say the drone was above the ground when the video cut out and do you agree that the drone was descending at approximately 9.x ft/s?
I have no axe to grind here and in fact would rather find in your favour but, unfortunately, what I see looks like pilot error.

Sean-bumble-bee Posted at 7-20 09:28
If you can, can you find the DAT, whose name might contain FLY032 and upload it to the google drive account?
If it can be read with CssvView etc, it would be interesting to see the motor rpm.

Thnx, i'll try to find it on the weekend

PalAlex Posted at 7-23 11:38
Thnx, i'll try to find it on the weekend

cheers ........ you should have found the .txt flight log in the folder ''FlightRecord'', in that folder there should be another folder named ''MCDatFlightRecord'', the .DAT, if it exists, should be in the ''MCDatFlightRecord'' folder.

Sandeepnataraju Posted at 7-22 01:17
Thank you for taking time and giving a detailed analysis.

Few pointers

"3. You do mention that I flew it ground, thats where I disagree. I lost contact of the drone, or the visual from my goggles (one of it) as I didnt intend to go so low."

You might like to have a look at BudWalkers reply, post 184,  in
https://forum.dji.com/forum.php? ... p;page=5#pid3372763
I asked if he would have a look at your log.

Sean-bumble-bee Posted at 7-24 10:05
"3. You do mention that I flew it ground, thats where I disagree. I lost contact of the drone, or the visual from my goggles (one of it) as I didnt intend to go so low."

You might like to have a look at BudWalkers reply, post 184,  in

Thanks Sean, I appreciate it. I am not trying to say your analysis is wrong. but the fact of the matter is I lost the drone because the connection to my goggles was lost before I could pull up, the logs shows that it continued the path (maybe the motion controller and the drone was connected and the visual got lost). I feel cheated as it wasn't an issue with me. I had no intention to fly so close to the water for the drone to touch / dip into water. This happened due to the fact the DJI has a flaw and they are not willing to accept

Here is the link to all the flight records if it helps - Couldnt figure which one is which. If you do have time and feel it is worth it, take a look at it. Either ways, I am disappointed with the way DJI is handling my case

https://drive.google.com/drive/folders/1Ka2p6Ku9idoKxjtjlDrB98sNqQTQo-cN?usp=drive_link

Sandeepnataraju Posted at 7-24 23:35
Thanks Sean, I appreciate it. I am not trying to say your analysis is wrong. but the fact of the matter is I lost the drone because the connection to my goggles was lost before I could pull up, the logs shows that it continued the path (maybe the motion controller and the drone was connected and the visual got lost). I feel cheated as it wasn't an issue with me. I had no intention to fly so close to the water for the drone to touch / dip into water. This happened due to the fact the DJI has a flaw and they are not willing to accept

Here is the link to all the flight records if it helps - Couldnt figure which one is which. If you do have time and feel it is worth it, take a look at it. Either ways, I am disappointed with the way DJI is handling my case

Ahhh a pity, I think the DATs are encrypted, Did you add the ".enc" at the end ?

"but the fact of the matter is I lost the drone because the connection to my goggles was lost before I could pull up" there we will have to disagree,

Loss of the imagery in the goggles didn't help but I think you lost imagery around 328.4 seconds, by which time the drone was at a height of 19ft or less relative to the take off point and, since the ground looks fairly flat, I think that's 19ft or less AGL.
At loss of the imagery the drone was descending at 9.x ft/s so there were probably 2 seconds or less left to save the drone but you continued to command descent until the log ends at 330 seconds, with the drone at a probable AGL of 4.2ft and descending at 9.5ft/s.

Could you have saved the drone if, at loss of signal, you had tilted the motion controller all the way upwards and given the drone full throttle ? I don't know, I dont know how quickly the Avata 2 can halt a 9.xft/s descent.

With the latter in mind was DJIFlightRecord_2024-07-06_[06-31-22].txt flown using the motion controller?

Sean-bumble-bee Posted at 7-25 03:21
Ahhh a pity, I think the DATs are encrypted, Did you add the ".enc" at the end ?

"but the fact of the matter is I lost the drone because the connection to my goggles was lost before I could pull up" there we will have to disagree,

For the flight, I have used motion controller. Hence you see weird reading and not that of a regular DJI controller.

I want to say I pulled up / tilted up (motion controller) at the 328 or slightly before time, but I am not sure, i panicked when the imagery got lost, in the motion I might have tried something

This is like the movie 'Sully' where Tom Hanks has starred. There is lot of data, but the true scenario is different from what the simulation is.

Net result - I lost a drone. I rest my case. Thanks Sean for helping

Sandeepnataraju Posted at 7-25 03:50
For the flight, I have used motion controller. Hence you see weird reading and not that of a regular DJI controller.

I want to say I pulled up / tilted up (motion controller) at the 328 or slightly before time, but I am not sure, i panicked when the imagery got lost, in the motion I might have tried something

"Net result - I lost a drone. I rest my case."
Fair enough, though one final comment that you might find useful if you get another drone, they don't "stop on a dime"

If you upload DJIFlightRecord_2024-07-06_[06-31-22].txt to phantom pilots then download and open its csv you might be able to move columns about to produce something similar to the attached.
Of the logs that you posted this was the only other log that I saw that had a significant descent speed that is comparable to the descent speed at the end of the crash flight.
At around 289.6 sec you begin to release the throttle, the descent speed is 8.8ft/s,
At 290.2 there is 0, zero, applied throttle ( 1204 ) but the drone hasn't yet stopped descending.
It stops descending at 290.5.
I imagine that as far as the drone is concerned disconnection of the control signal 'zeros'  the throttle instantly, I do not know if it will actively 'brake' in the vertical sense but drone's don't " stop on a dime".

Sean-bumble-bee Posted at 7-23 11:49
cheers ........ you should have found the .txt flight log in the folder ''FlightRecord'', in that folder there should be another folder named ''MCDatFlightRecord'', the .DAT, if it exists, should be in the ''MCDatFlightRecord'' folder.

Hi!
There are no any dat file in this folder

PalAlex Posted at 7-28 00:17
Hi!
There are no any dat file in this folder

That is a pity,
Am I correct in thinking that manual mode can only be flown when using a controller with joysticks ?

To be honest I am thinking you might have had a propeller problem but that is largely guess work and due to the current drawn from the battery dropping significantly at the end of the log.
I wouldn't be surprised if I am wrong.
The DAT might have shown motor RPM which would show a prop break or loss   ;-((((((((


I think you best bet for finding out why this happened is to post the story and phantomhelp URL in https://mavicpilots.com/forums/crash-flyaway-assistance.85/
I know it isn't the Avata section but I think their log reading people will still have a look.

Update - DJI Customer service team were extremely patient and heard my 'cries' and have shipped a replacement drone at a discounted price. I wasn't expecting the gesture and had almost written off and truly sulking, but the team at customer services (Coco the Cust Service Manager) was very helpful and understanding. Sean, thank you too for patiently listening and explaining the tech details. Hoping to 'Not' crash my new drone

Sandeepnataraju Posted at 7-30 11:08
Update - DJI Customer service team were extremely patient and heard my 'cries' and have shipped a replacement drone at a discounted price. I wasn't expecting the gesture and had almost written off and truly sulking, but the team at customer services (Coco the Cust Service Manager) was very helpful and understanding. Sean, thank you too for patiently listening and explaining the tech details. Hoping to 'Not' crash my new drone

good result, if you lose video again tilt the motion controller upwards and give it full throttle until you are sure you are high enough to be safe.
The wrong 'knee jerk' sent my mavic into a tree, I should have gone up.
We learn by our mistakes or hopefully so.

Sandeepnataraju Posted at 7-30 11:08
Update - DJI Customer service team were extremely patient and heard my 'cries' and have shipped a replacement drone at a discounted price. I wasn't expecting the gesture and had almost written off and truly sulking, but the team at customer services (Coco the Cust Service Manager) was very helpful and understanding. Sean, thank you too for patiently listening and explaining the tech details. Hoping to 'Not' crash my new drone

Hi there.

We do apologize for the trouble that this has caused. Thank you for keeping us posted. We're glad to hear this has been addressed.

Feel free to contact us if you have other inquiries. Have a nice day ahead!

Sean-bumble-bee Posted at 7-28 01:51
That is a pity,
Am I correct in thinking that manual mode can only be flown when using a controller with joysticks ?

I checked another topics with video signal lost issue.
and utube videos:
https://www.youtube.com/watch?v=dyHa0OpZgVI
https://www.youtube.com/watch?v=H2iLK0sn824
https://www.youtube.com/watch?v=k-qQ6qdM3i4

It's clear for me now - when video freezed  i was moving the sticks in the blind. And any logs will show - my drone felt by my fault. This "freeze" cant be registrated by any built-in service of DJI equipment. "Camera view before loss" do not show last seconds, cause the google haven't got it really.
You will lost your 1000$ dron at any unlikely moment of flight.
Fpv drones cant be flown without any vision, so..

PalAlex Posted at 7-28 00:17
Hi!
There are no any dat file in this folder

Just had another idea, have a look at

https://forum.dji.com/forum.php? ... 1&extra=#pid3378007

in particular post 23.

Move all the logs from the phone to computer, note MOVE not copy.
If you have an android phone, uninstall the current version and install an older version.
Once that older version has been installed and BOOTED switch the phone's wifi off and connect the phone to the goggles.
That should trigger another download from the goggles and, with phone's WiFi off there is a chance you will have DAT logs that might be readable.