CruiseHabit
lvl.3
Flight distance : 93225 ft
United States
Offline
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DJI Mindy Posted at 12-21 02:29
Sorry to know you haven't received the final analysis result, we will inform the team to send you again if needed.
The drone will enter into ATTI mode automatically when the GPS signal is weak, in this mode, the drone is unable to position or auto-brake itself, which may lead a flight hazard. We never recommended customers to fly in ATTI mode unless customers have rich flight experience. Please check the screenshot below of the Mavic Air Disclaimer and Safety Guidelines: https://dl.djicdn.com/downloads/Mavic%20Air/Mavic%20Air%20Disclaimer%20and%20Safety%20Guidelines%20v1.0.pdf[view_image]
We are so sorry for the misunderstanding of the status in the repair Progress Inquiry, we have forwarded it to the related team to double check what happened since your case is not a warranty case, you will need to pay for it or use the DJI Care Refresh. If you agree to use the DJI Care Refresh, please find the quotation email and pay for it, we will arrange to send the replacement drone to you as soon as possible.
I don't expect you to fold on this, as you're doing your job in towing the company line, and using the fact that I was in ATT mode as an out. I get that, and I don't hold that against you. That in mind, I will continue to point out the flaw in this situation (beyond the poor customer communication up until this thread).
"...in this mode, the drone is unable to position or auto-brake itself, which may lead a flight hazard."
This was no a loss of control b/c of lack of auto-braking, nor was it a lack of accurate altimeter information. The logs clearly indicate that much. The aircraft was under my control, flying as expected. It then began to descend despite the left stick being up the entire time. Horizontal control was maintained (again, not an auto-braking issue here), allowing me to bring it to shore as it continued to descend regardless of pilot input or the aircraft's altitude (which it was measuring appropriately in ATT mode).
"We never recommended customers to fly in ATTI mode unless customers have rich flight experience"
This is a completely fair recommendation. I don't disagree with it one bit. The problem in my case is that no amount of pilot experience or skill would have prevented the aircraft from descending, as the aircraft disregarded the control inputs with regard vertical speed and altitude, despite having valid altimeter data.
I would like to ask if the following is the designed and intended behavior:
In ATT mode, the aircraft successfully takes off and maintains controled flight with proper pilot input. Flight is level, conditions are calm, and the altimeter reading is correct. Suddenly the aircraft begins a smooth but rapid descent. The pilot gives control input to climb, and the aircraft continuously descends regardless of said control input until the aircraft makes unintended contact with the ground.
I'm adamant about this as I've not been offered any reason for this to have occured, and frankly, while I'd rather not pay $69 (an invoice that, as a reminder, I was told via chat yesterday to ignore), it's not the end of the world. In other words - I'm not following up becuase I don't want to pay $69. I'll pay, that's fine. I'm following up and continuously restating my point because absent of any additional information, the aircraft became uncontrollable for reasons that indicate to me (and seemingly other more experienced pilots on the forum) that indicate some sort of malfunction. I can only hope that malfunction is an isolated hardware problem, if not however, it could indicate that a dangerous condition exists on other DJI aircraft, and I want to make sure that is properly evaluated. If someone can provide me logical explanation as to what happened, that reasonably suggests there isn't a problem, then that'd be great - we can all learn something. Unless and until that happens, I stand firm that there is something that needs to be looked at and corrected - unless of course, the italicized text above (about the intended behavior) is indeed correct, in which case I simply disagree with DJI, and do not find that design to be safe.
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