Flying the Mavic 2 Pro today and out of the blue I got the message "Switched to Backup IMU",  followed by "Navigation System Redundancy Switch" and various messages about obstacle avoidance being off.  Thenthe screen went black for about 5 seconds,  I genuinely thought I'd lost it.  When the screen came back I flew straight home and landed.  Now debating if I need to do an IMU calibration or is this a common thing,  I have about 157 flights so far and have never seen this before.

Good thing is if you had the Air 2 instead the drone would probably be gone... for those saying that the lack of a redundancy system isn't a flaw.
Happy that you didn't lose your bird man

El Diabolico Posted at 5-12 05:49
Good thing is if you had the Air 2 instead the drone would have probably be gone... for those saying that the lack of a redundancy system isn't a flaw.
Happy that you didn't lose your bird man

thanks El Diabolico,  I thought it dropped out the sky when the video feed went black.  

Scary stuff.
Maybe the log files will reveal something?

Montfrooij Posted at 5-12 06:16
Scary stuff.
Maybe the log files will reveal something?

The log files just show these messages.

I would toss in an IMU calibration to see if the prime and secondary imu units take the calibration...
Might show if there is an issue.

DAFlys Posted at 5-12 06:32
The log files just show these messages.

Oh, bugger.

Flycaster Posted at 5-12 06:40
I would toss in an IMU calibration to see if the prime and secondary imu units take the calibration...
Might show if there is an issue.

Thanks for the suggestion,  it certainly wouldn't hurt to try that,  I did notice my second gyro was a little worse than the primary.

OK,  So I did the IMU calibration and then flew for 15 minutes no higher than 8 feet just in case and no warning appeared.  Heres how my IMU is looking,  does this look OK?

They look good.

Woe Posted at 5-12 18:42
They look good.

Thanks Woe,  I just need to take it somewhere empty for a few test flights before I get confidence in it again.

DAFlys Posted at 5-12 06:12
thanks El Diabolico,  I thought it dropped out the sky when the video feed went black.

I can imagine... lost connection once when I flew behind a mountain (I was filming an inhabited island literally in the middle of the Atlantic)... scared the hell out of me as RTH didn't kicked immediately. My fault 100%, drone came back triumphant nevertheless

DAFlys Posted at 5-12 23:59
Thanks Woe,  I just need to take it somewhere empty for a few test flights before I get confidence in it again.

Good luck my friend. Lets hope it was a one and done thing.

I had it once about a 8 months ago and never did return, just one of them flukes you get every now and then with all this complicated stuff about nowadays.  

El Diabolico Posted at 5-13 05:58
I can imagine... lost connection once when I flew behind a mountain (I was filming an inhabited island literally in the middle of the Atlantic)... scared the hell out of me as RTH didn't kicked immediately. My fault 100%, drone came back triumphant nevertheless

I hate loosing a connection,  I wish there was a way to force FCC mode sometimes.

Woe Posted at 5-13 06:01
Good luck my friend. Lets hope it was a one and done thing.

I have my fingers crossed for that,  just need to do a few flights where I can recover it easily if there is an issue as I still have DSJI refresh on it and warranty.

raven swe Posted at 5-13 06:59
I had it once about a 8 months ago and never did return, just one of them flukes you get every now and then with all this complicated stuff about nowadays.

thanks thats goods too know, I hope mine is the same.

DAFlys Posted at 5-13 07:02
I have my fingers crossed for that,  just need to do a few flights where I can recover it easily if there is an issue as I still have DSJI refresh on it and warranty.

At least you have that.

I had the same error two times. IMU calibration fixed it for me.

Woe Posted at 5-13 07:07
At least you have that.

Indeed,  just need it to crash somewhere I can get it back though.  

dronespilot Posted at 5-13 07:51
I had the same error two times. IMU calibration fixed it for me.

Thats good to know, I did a calibration and now need to do some test flights somewhere I can retrieve it from easily if the worst happens.

DAFlys Posted at 5-14 00:19
Indeed,  just need it to crash somewhere I can get it back though.

No crashes please.

I just had the same problem on my mavic zoom. I managed to bring the drone back, but it still hit the ground hard, and it took me more than a good minute to shut down the engines, the controls being blurred. I've never had this problem in over 80 flights?!

Woe Posted at 5-14 05:33
No crashes please.

Indeed I really don't want a crash.

IgOrdure Posted at 5-14 09:03
I just had the same problem on my mavic zoom. I managed to bring the drone back, but it still hit the ground hard, and it took me more than a good minute to shut down the engines, the controls being blurred. I've never had this problem in over 80 flights?!

Check you IMU calibration,  I did that after my issue and afterwards the graph was much lower.

    One thing you can do to help reduce damage to the drone if you lose control, is get a parachute system for it.  I saw it on YouTube and it is called parazero I believe.   The only downside is the price, $1500 US.  That is what I paid for my Mavic 2 Pro!  However, considering that is reusable and can save your drone from severe and costly damage, I think it is worth it.  It will also increase your chance of getting a waiver from the FAA  as it is a safety device.

Dirt Buster Posted at 5-16 05:39
One thing you can do to help reduce damage to the drone if you lose control, is get a parachute system for it.  I saw it on YouTube and it is called parazero I believe.   The only downside is the price, $1500 US.  That is what I paid for my Mavic 2 Pro!  However, considering that is reusable and can save your drone from severe and costly damage, I think it is worth it.  It will also increase your chance of getting a waiver from the FAA  as it is a safety device.

I don't fly in the USA so probably not a lot og help to me.

After doing the IMU calibration Ive had 4 very safe flights and so far no new issues.   

DAFlys Posted at 5-19 00:47
After doing the IMU calibration Ive had 4 very safe flights and so far no new issues.

And sadly on flight 6 after calibration were back to the switching to backup IMU messages and dropping video briefly.

IgOrdure Posted at 5-14 09:03
I just had the same problem on my mavic zoom. I managed to bring the drone back, but it still hit the ground hard, and it took me more than a good minute to shut down the engines, the controls being blurred. I've never had this problem in over 80 flights?!

Hi, just had the same notifications with my M2Z....already lost one M2Z through malfunction with GPS ( DJI gave me 50% discount on new M2Z)....Keen to know what you did to resolve the issue...Cheers

IgOrdure Posted at 5-14 09:03
I just had the same problem on my mavic zoom. I managed to bring the drone back, but it still hit the ground hard, and it took me more than a good minute to shut down the engines, the controls being blurred. I've never had this problem in over 80 flights?!

Hi, I have a M2Z with same messages. What have you done to rectify the issue and has it happened again
Not keen on flying again until i get sorted. I have already lost one M2Z....Cheers