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2626 53 2018-7-29
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Gstan30117
lvl.4
Flight distance : 228645 ft
United States
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My Mavic Pro is MIA. I have downloaded the logs and I have DJI Care. Where do I go for help?

Thanks
2018-7-29
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DJI Stephen
DJI team
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I am sorry to know what happened to your DJI Mavic Pro. Since this issue happened please contact DJI Support at www.dji.com/support or you can send an email to support@dji.com for further help on this issue and how to use the DJI Care on your Drone. Please sync the flight records as well using your DJI Go 4 application for further analysis.
2018-7-29
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Gstan30117
lvl.4
Flight distance : 228645 ft
United States
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DJI Stephen Posted at 2018-7-29 12:12
I am sorry to know what happened to your DJI Mavic Pro. Since this issue happened please contact DJI Support at www.dji.com/support or you can send an email to  for further help on this issue and how to use the DJI Care on your Drone. Please sync the flight records as well using your DJI Go 4 application for further analysis.

Thank you for the information. I have contacted DJI and sent them my logs. As we are leaving on a 6 wk. vacation in 3 wks. I was wondering how long it will take to come to a decision about my Care claim? Could I buy another MP and be reimbursed if they approve my claim?
2018-7-30
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dbparti024
Second Officer
Flight distance : 3343 ft

United States
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Did your MP fly away by itself, the map track should show you where it landed?
2018-7-30
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Gstan30117
lvl.4
Flight distance : 228645 ft
United States
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dbparti024 Posted at 2018-7-30 11:18
Did your MP fly away by itself, the map track should show you where it landed?

It lost power at 700 ft. will it still show?
2018-7-30
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B1houdini
Captain
Flight distance : 927927 ft
United States
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Gstan30117@hotmail.com Posted at 2018-7-30 12:08
It lost power at 700 ft. will it still show?

If you upload your Flight log to DJI Flight Log viewer   and post it back on the forum someone here could help pinpoint it on a map for you.
2018-7-30
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gnirtS
Captain
Flight distance : 5712575 ft
United Kingdom
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Lost power at 700ft?

Did it just suddenly disconnect with lots of battery remaining OR did it have 0 battery ?  That makes a big difference to where it might be.
2018-7-30
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moulinrouge
lvl.1
Flight distance : 119065 ft
Indonesia
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Gstan30117@hotmail.com Posted at 2018-7-30 12:08
It lost power at 700 ft. will it still show?

It should send its last GPS location
Check it again, then try search around that location

Best wishes
2018-7-30
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Gstan30117
lvl.4
Flight distance : 228645 ft
United States
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gnirtS Posted at 2018-7-30 12:48
Lost power at 700ft?

Did it just suddenly disconnect with lots of battery remaining OR did it have 0 battery ?  That makes a big difference to where it might be.

Zero battery. Here's a link to my flight record. http://www.phantomhelp.com/logviewer/WWODSPXZR7I3REHQC45H/

I live in a heavily wooded area so to find it I'll have to have some sort of waypoint for my GPS.

Thanks
2018-7-30
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Wachtberger
Captain
Flight distance : 261509 ft
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Gstan30117@hotmail.com Posted at 2018-7-30 14:16
Zero battery. Here's a link to my flight record. http://www.phantomhelp.com/logviewer/WWODSPXZR7I3REHQC45H/

I live in a heavily wooded area so to find it I'll have to have some sort of waypoint for my GPS.

Sorry for your crash but it was somewhat "home made". Nevertheless the aircraft should be very near to take off location. Last distance to home was 9.9ft and thereafter it must have fallen like a stone vertically down to ground. Since you have care refresh it is definitely worth searching more for it. If you don't get the remainings back, care refresh will be difficult or rather impossible.
2018-7-30
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ghostrdr
First Officer
Flight distance : 1272723 ft
United States
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I'm surprised it didn't fall on your head.
2018-7-30
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HedgeTrimmer
Captain
United States
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Gstan30117@hotmail.com Posted at 2018-7-30 14:16
Zero battery. Here's a link to my flight record. http://www.phantomhelp.com/logviewer/WWODSPXZR7I3REHQC45H/

I live in a heavily wooded area so to find it I'll have to have some sort of waypoint for my GPS.

I don't believe you need a GPS.  Last GPS coordinates (sent at height of 700-feet) are almost identical to take off point.

Impact_Zone.jpg

However, you might need a shovel to dig through impact crater.

2018-7-30
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Gstan30117
lvl.4
Flight distance : 228645 ft
United States
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HedgeTrimmer Posted at 2018-7-30 15:04
I don't believe you need a GPS.  Last GPS coordinates (sent at height of 700-feet) are almost identical to take off point.

[view_image]

Yes. the only problem is there was a pretty good breeze and with a 700 ft. drop it could have easily drifted into the woods that encroach my property and be stuck in the top of one of the trees of our woods.

Thanks for the help, I'll keep searching.
2018-7-31
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InvisibleName 7
Captain
Flight distance : 795653 ft
United States
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Gstan30117@hotmail.com Posted at 2018-7-31 04:13
Yes. the only problem is there was a pretty good breeze and with a 700 ft. drop it could have easily drifted into the woods that encroach my property and be stuck in the top of one of the trees of our woods.

Thanks for the help, I'll keep searching.

If the battery was dead, the MA would have fallen like a brick! I can't see that it would have drifted far, but as previous comment, it may be 'sub-surface'! Look for a moon-like crater & you'll probably find it at the bottom!!

Just a comment on your flight - you took off with a battery charge of only 40% and then proceeded to climb to 1400 feet?  What were you expecting to happen!!

2018-7-31
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gnirtS
Captain
Flight distance : 5712575 ft
United Kingdom
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Check the wind speed and direction on Air-data to see where it could have drifted.
Although 700ft is only about 5 seconds or so of falling it might have moved slightly.  Also, dropping from 700ft there might be nothing left of it bigger than a finger nail.

For a 100% self inflicted loss of drone though they're not going to cover any sort of warranty.  Refresh MAYBE if you can can get enough bits of it back.
2018-7-31
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Gstan30117
lvl.4
Flight distance : 228645 ft
United States
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InvisibleName 7 Posted at 2018-7-31 04:17
If the battery was dead, the MA would have fallen like a brick! I can't see that it would have drifted far, but as previous comment, it may be 'sub-surface'! Look for a moon-like crater & you'll probably find it at the bottom!!

Just a comment on your flight - you took off with a battery charge of only 40% and then proceeded to climb to 1400 feet?  What were you expecting to happen!!

Thank you so much for your comment on my flight. Just curious, have you seen anywhere in this post where I have tried to blame someone else or the drone? No, I didn't think so, thanks for rubbing my nose in it.
2018-7-31
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Gstan30117
lvl.4
Flight distance : 228645 ft
United States
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InvisibleName 7 Posted at 2018-7-31 04:17
If the battery was dead, the MA would have fallen like a brick! I can't see that it would have drifted far, but as previous comment, it may be 'sub-surface'! Look for a moon-like crater & you'll probably find it at the bottom!!

Just a comment on your flight - you took off with a battery charge of only 40% and then proceeded to climb to 1400 feet?  What were you expecting to happen!!

Thank you so much for your comment on my flight. Just curious, have you seen anywhere in this post where I have tried to blame someone else or the drone? No, I didn't think so, thanks for rubbing my nose in it.
2018-7-31
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B1houdini
Captain
Flight distance : 927927 ft
United States
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Really sorry for your loss. Hope you find the Mavic
Here is the flight route from your Flight record.
Does look like it went straight up and came straight down and crashed at your feet.


2018-7-31
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G_Sig
Captain
Flight distance : 9109311 ft
Iceland
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Gstan30117@hotmail.com Posted at 2018-7-31 16:51
Thank you so much for your comment on my flight. Just curious, have you seen anywhere in this post where I have tried to blame someone else or the drone? No, I didn't think so, thanks for rubbing my nose in it.

This is the most likely area IMO.

2018-7-31
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InvisibleName 7
Captain
Flight distance : 795653 ft
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Gstan30117@hotmail.com Posted at 2018-7-31 16:50
Thank you so much for your comment on my flight. Just curious, have you seen anywhere in this post where I have tried to blame someone else or the drone? No, I didn't think so, thanks for rubbing my nose in it.

Sorry, didn’t mean to come over that way.  My comment was really intended to make sure anybody else not aware of how to read the data log understood the circumstances of the crash; we all need to learn from each other’s ‘mistakes’! Hopefully you accept my apology
2018-7-31
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InvisibleName 7
Captain
Flight distance : 795653 ft
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Gstan30117@hotmail.com Posted at 2018-7-31 16:50
Thank you so much for your comment on my flight. Just curious, have you seen anywhere in this post where I have tried to blame someone else or the drone? No, I didn't think so, thanks for rubbing my nose in it.

Sorry, didn’t mean to come over that way.  My comment was really intended to make sure anybody else not aware of how to read the data log understood the circumstances of the crash; we all need to learn from each other’s ‘mistakes’! Hopefully you accept my apology
2018-7-31
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davidmartingraf
Captain
Flight distance : 84805085 ft
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Sorry to hear about your loss.

Can you clarify 700 feet loss? Do you mean your MA was 700 feet up in the air or 700 feet distance from the home point? I didn't review your flight log, just read a few commenting that the MA would fall hard 700 feet in the air? I don't believe it's permitted to fly over 400 feet given anything to 700 is reserved for manned aircraft?
2018-7-31
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nmac
First Officer
Flight distance : 256 ft
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davidmartingraf Posted at 2018-7-31 23:54
Sorry to hear about your loss.

Can you clarify 700 feet loss? Do you mean your MA was 700 feet up in the air or 700 feet distance from the home point? I didn't review your flight log, just read a few commenting that the MA would fall hard 700 feet in the air? I don't believe it's permitted to fly over 400 feet given anything to 700 is reserved for manned aircraft?

David, logs show a distance of around 10 feet but up to 1400 feet high not 700.  700 was the last recorded altitude on log. But not all truth has been told I feel, and will leave it up to the toy pros hear to decide.
2018-8-1
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davidmartingraf
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Flight distance : 84805085 ft
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nmac Posted at 2018-8-1 01:12
David, logs show a distance of around 10 feet but up to 1400 feet high not 700.  700 was the last recorded altitude on log. But not all truth has been told I feel, and will leave it up to the toy pros hear to decide.

OK, thanks for clarifying.
2018-8-1
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miketmtpro
Second Officer
Flight distance : 1883940 ft
United States
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I thought these get locked at 400' or so

1400' battery could have snapped off in high winds. Even on a good day here with 5mph winds  AGL, at 1500' they can be 40-60 mph every day

1400' drop I'd be surprised if there is much left of it

even though the bird is heavy, without the battery it could drift off in a high wind, so check a good 50-75m around the property, maybe more.With the battery it'd be like a small brick coming down.
2018-8-1
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InvisibleName 7
Captain
Flight distance : 795653 ft
United Kingdom
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I find the idea of even the strongest wind being able to “snap” the battery off VERY unlikely, unless it hadn’t been properly installed
2018-8-1
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Koelkop
Second Officer
Flight distance : 22814806 ft
South Africa
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What happens to a LiPo battery when the voltages go that low? Does it not puff up?
2018-8-1
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Koelkop
Second Officer
Flight distance : 22814806 ft
South Africa
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Something funny is up with his battery, The one time I let my battery go down to 0% the cell voltages was still above 3.3volts. The one cell of his battery already went below 3v at 18% battery left!

2018-8-1
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gnirtS
Captain
Flight distance : 5712575 ft
United Kingdom
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miketmtpro Posted at 2018-8-1 06:18
I thought these get locked at 400' or so

1400' battery could have snapped off in high winds. Even on a good day here with 5mph winds  AGL, at 1500' they can be 40-60 mph every day

No 400ft lock.  Lots of countries have 400ft laws but not all.  It'll climb to 1640ft

Although winds CAN be a lot stronger at altitude it isn't always the case and the drone will warn you about wind.
Ive had plenty of days with calm winds from surface up to max altitude.  So yes, it can be but pay attention if the drone gives one of the 2 warnings.
His log files do not show strong winds though at any altitude.

Mavis also reaches terminal velocity after a relatively short altitude (calculations are on another forum)  From 700ft you're looking at 5 seconds or so from stopping to impact which isnt much time to drift in the wind.
HOWEVER, it could tumble meaning it'll move a bit.

From 1400ft, assuming it takes about 10 seconds to hit the floor (again, calcs on mavic terminal velocity are elsewhere) that means with the highest wind on that log of 20km/h it could travel about 55m.
Given winds were less most of the time you'd expect it to be within 55m downwind of the disconnect.  Roughly.  But if it tumbled all bets are off.

2018-8-1
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Gstan30117
lvl.4
Flight distance : 228645 ft
United States
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InvisibleName 7 Posted at 2018-7-31 22:32
Sorry, didn’t mean to come over that way.  My comment was really intended to make sure anybody else not aware of how to read the data log understood the circumstances of the crash; we all need to learn from each other’s ‘mistakes’! Hopefully you accept my apology

Of course, I accept, also I may be a bit oversensitive after the loss of a good friend.
2018-8-1
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Gstan30117
lvl.4
Flight distance : 228645 ft
United States
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gnirtS Posted at 2018-8-1 12:28
No 400ft lock.  Lots of countries have 400ft laws but not all.  It'll climb to 1640ft

Although winds CAN be a lot stronger at altitude it isn't always the case and the drone will warn you about wind.

Very interesting, this is the kind of information that helps me know where to look for the corpus delicti. The avg. winds were out of the SE @ 10 mph, that's the avg. But if you're anywhere near correct on your calculations that puts my drone approx. 75 ft. past the tree line. I have been searching but to compound matters, we have steady rain. Also, it may not have made it through the canopy.

Thanks
2018-8-1
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gnirtS
Captain
Flight distance : 5712575 ft
United Kingdom
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Your own logs show the wind speed varied from 6 to 20 kmph and at different altitudes.  So i just assumed MAX speed all the way down.  That'll give a theoretical furthest distance.  So start there and work back towards HP.
Also it could be stuck high in a tree.
2018-8-2
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Gstan30117
lvl.4
Flight distance : 228645 ft
United States
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I compared a previous flight with this one and on the first one in 1 min. 16 sec. my battery went from 20% to 14%. During this flight, in 1 min. 10 sec. my battery went from 20% to 1%. Here are the two flights I compared:
#1 https://www.phantomhelp.com/logviewer/J2RBGWZXEEK1ELJO0B8F/

#2 (the crash) https://www.phantomhelp.com/logviewer/WHZ9TA7VRSTZS0RMDPGD/



2018-8-2
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Koelkop
Second Officer
Flight distance : 22814806 ft
South Africa
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Gstan30117@hotmail.com Posted at 2018-8-2 05:16
I compared a previous flight with this one and on the first one in 1 min. 16 sec. my battery went from 20% to 14%. During this flight, in 1 min. 10 sec. my battery went from 20% to 1%. Here are the two flights I compared:
#1 https://www.phantomhelp.com/logviewer/J2RBGWZXEEK1ELJO0B8F/

That is why I posted my log showing the voltages at 0% battery. Something happened to your battery. At 18% cell nr1 on your battery was already below 3v which is the point of no return for a LiPo battery. And the deviation between cells of 1.25v at the end is way out of whack..
2018-8-2
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Gstan30117
lvl.4
Flight distance : 228645 ft
United States
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Koelkop Posted at 2018-8-2 10:16
That is why I posted my log showing the voltages at 0% battery. Something happened to your battery. At 18% cell nr1 on your battery was already below 3v which is the point of no return for a LiPo battery. And the deviation between cells of 1.25v at the end is way out of whack..

Epilog: This today from DJI.
Thanks for your patience.

The unfortunate incident that occurred to your aircraft has been confirmed as a warranty case according to our data analysis.

We would like to offer you a replacement, Mavic Pro aircraft (without the remote controller and battery charger).

Koelkop, Thank you for your input, I quoted your post and submitted my flight records with the explanation of the battery voltages that you provided which in turn resulted in the DJI decision.

And thank you DJI.

2018-8-9
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shipwama
lvl.3
Flight distance : 38576 ft
Canada
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Great job,
So many smart people on here who can distinguish all of these things.
2018-8-9
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InvisibleName 7
Captain
Flight distance : 795653 ft
Switzerland
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Great news!
2018-8-9
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rwynant V1
Captain
Flight distance : 4842277 ft
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United States
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Great!!  DJI acknowledging battery issues may be causing loss of AC.

Some great input in this thread, ultimately assisting a fellow pilot to a positive end.

Randy
2018-8-9
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Picanoc Jack
Captain
Flight distance : 10149541 ft
Canada
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Gstan30117@hotmail.com Posted at 2018-7-31 16:50
Thank you so much for your comment on my flight. Just curious, have you seen anywhere in this post where I have tried to blame someone else or the drone? No, I didn't think so, thanks for rubbing my nose in it.

You did inquire if DJI would honour their warranty though, that being said I am truly sorry for your loss and misfortune,  mind you I personally been there done that.
2018-8-9
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Picanoc Jack
Captain
Flight distance : 10149541 ft
Canada
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All right Mate so very happy for you
2018-8-9
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