Key legal question
Whether the appeal against the interlocutory order joining the proceedings was admissible.
Extracted holding
The appeal was inadmissible because no irreparable disadvantage from the joinder was shown.
Extracted reasoning
The court accepted the lower court's view that the joined southern-approach proceedings would likely become partly moot after approval of the provisional operating regulations; a separate decision would not lead to a faster or more meaningful resolution, so no non-remediable harm resulted.