Went to fill up today and the key just keeps turning and not unlocking the filer cap. think the internals of the barrel have corroded away.

Is there anyways i can get to the cap from inside the wing? (ERST)

thought about maybe removing the fuel pipe fomr the tank to the wing and getting to the working of the lock from there. Just really need to remove it as ive no way of putting fuel in my daily driver

cheers