Engineering mount issue

[Ashcow]

I currently play an engineer. i have created both of the engineer only flying mounts and i am wondering. if i have already learned them and i drop engineering will i still be able to use them or will they sit in my mounts tab becoming unable to use? this is a big thing on my decision on whether or not i will drop engineering. please help

[Kscrub]

They will still be in your "Mounts", but unfortunately, you won't be able to use them.

[Bessemor]

Your mounts will still be in your tab and still count towards the achivment, but you wont be able 2 use them.