Fbx animation's rig go wrong after importing

Hello check these images to see what I mean.All I do is to get the same file that I've attached to this post to unity and then put Animation's type to humanoid and click apply this is what I get.How Can I fix this?tried with unity 5.6 and 2018 the same result on both.I read somewhere that it should be on the T-pose but it's not possible to be on T-pose on frame 0 and then be on the next pose the animation will look terrible then.What can I do please help. Here's the fbx link: http://www.mediafire.com/file/nrx6onhcgxn4pn2/a@run.fbx/file in maya: https://ibb.co/bW6RPp https://ibb.co/e9Npc9 in unity: https://ibb.co/cHhY4p https://ibb.co/d1TjAU

This file is only animation and has no model.We made hundred of these animations and we don't want to lose them.Please tell us a way that can fix all of them not only this animation.Thanks.,Hello check these images to see what I mean.All I do is to get the same file that I've attached to this post to unity and then put Animation's type to humanoid and click apply this is what I get.How Can I fix this?tried with unity 5.6 and 2018 the same result on both.I read somewhere that it should be on the T-pose but it's not possible to be on T-pose on frame 0 and then be on the next pose the animation will look terrible then.What can I do please help. Here's the fbx link: http://www.mediafire.com/file/nrx6onhcgxn4pn2/a@run.fbx/file in maya: https://ibb.co/bW6RPp https://ibb.co/e9Npc9 in unity: https://ibb.co/cHhY4p https://ibb.co/d1TjAU