
Only 2 of the corners are secured with pins.
The dampeners are a $4 part...
Yuneec Rubber Dampers: CGO3+
The entire lower CGO3+ mount set is a $10 part...
Mount Set: Yuneec Typhoon H CGO3+
If those dampeners are actually missing after only one flight, they were likely damaged or not properly installed before you launched... it is definitely a preflight item to check. Several members on here have used small zip ties or fishing line in the 2 corners that do not have the pins... just make sure they are secured loosely enough, to not interfere with the dampeners during flight.
https://www.amazon.com/Snap-ADJUSTABLE-Security-Plastic-Fastener/dp/B006PL6N4K/ref=sr_1_2
Of course if you want to put this in as a warranty claim you can submit that... you'll probably be without your H for 6 weeks or more, for a spare maintenance part that you should be keeping on hand.
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