Ooze is used as a verb here. If someone oozes something, that means they have a lot of it. Books=subject in both cases:
Books hold down the wings of a grounded aircraft. Books ooze dried poppies.
Other than that I think you are right that the books are preventing the plane from flying. It is a way of saying that if we appreciate the memories (from the books), we will think twice before we fly the plane again. Or we will not fly it at all = we will not fight. This is how I would interpret this piece of art.