Nexus 7 stuck on google's logo after flashed the building of AOSP

Thanks to @Tamoghna Chowdhury for linking this to a similar question i had posted. I had similar issues and struggled with it for a while. You need to check some things. Did you flash the device specific binaries ?

In my case there was a version mismatch with the device specific binary and the device. FLO should always have FLO binaries. Otherwise it wont start. Check this post

https://code.google.com/p/aosp4nexus5/wiki/AOSPforNexus5#Automatic_Installatin_of_GApps

I did this long ago, so I don't remember exact step i had take, If you post details of what you have done, maybe i'll remember something.

EDIT :Updating answer based on below comment from OP

Use the second link you mentioned https://developers.google.com/android/nexus/drivers#flolrx22g

Your device is flo. That is the first step. Now, your AOSP build should match with the binaries version. So you cant use 5.1.51 along with binaries of version LMY48G since that is for 5.1.1 . SO checkout AOSP with the same version, i.e 5.1.1 in your case and build again with the LMY48G binaries. I remember i had the same issue but with version 5.0.1 i.e LRX22G. It worked when i checkedout an older source code.

I dont know why this happens, ideally any new version should work. Perhaps another quirks of android. I did not update android later on when the tablet booted correctly. Too big a risk to take :)