I had a Stiletto at a base that I was going to replace with a better aircraft, but first I wanted to strip off the particle cannons and alien armor to reuse on the next aircraft. Unfortunately I forgot that I was using that base as a storage depot, and storage was 10000/10000 full, no room for any more components. But no warning was issued before removing the components, and once they were removed I'm not sure what happened to them. It's possible they were auto-sold, or they just vanished, I didn't check (sorry). ''edit: I have now checked and items are not sold (money doesn't change).''

I would suggest if the user tries to remove aircraft components at a base, the required storage amount should be pre-allocated (similar to transferring) and if it's not available issue a warning. The user should have to manually clear space at the base (sell or transfer elsewhere), or I guess possibly have an option to sell the component as soon as it's removed, but only if the user specifically chooses this option.