When a runway is reserved, its info window labels the reservating vehicle a "train" whereas it should be a "plane", as shown in this screenshot:
flying-train.png
That seems to be an issue with the English translation - the untranslated text in schiene_t::info ("\nis reserved by:") does not refer to trains.
That will also show wrong info for stops with cars as well as maglevs etc. Fixed the translation for English and a few other languages. But the English template from Train is pretty persistent.