I am pretty sure there was some restructuring going on a while ago that changed the layout of the streets a bit. Someone with accurate equipment and skill might want to check it out and update OSM accordingly.

There's a node with building=hangar here, but I cannot verify that from either memory or satellite images. Can someone elaborate?

Aktuell gibt es hier bauliche Maßnahmen - ggf. sind zu einem späteren Zeitpunkt hier Änderungen notwendig.