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RE : i have a hubsan h109s which is crashed due to faulty motors but here for some knowledge!
This is how I interpret your post.......Your drone was in flight but it crashed because of faulty motors.
A drone requires all its 4 motors working properly or it will not be able to take off. In other words, a drone with faulty motors will not have a chance to crash because it will not be able to takeoff at all.
Would you please elaborate a little further?