Did the plane crash in season six finale of army wives?

You are correct! The season six finale of Army Wives did not feature a plane crash. The episode, titled "Forever and Always," focused on the aftermath of the devastating tornado that struck Fort Meade and the community's efforts to rebuild.

It sounds like you might be thinking of a different show or a different season finale. Perhaps you could provide more details about what you're remembering, and we can try to figure out what show or episode you're thinking of!