What are those?
Edit: Also, on an Aviation note. Whether a plane flies or not doesn't determine whether it needs a maintenance check or not. The schedule prescribes a check every 24/48 hours, the plane gets a line check every 24/48 hours. I had a plane stuck up North once because of a blizzard and when the wx finally improved I had to fly in an AME to perform the line check before I could fly the plane out. The plane hadn't moved in three days but the check still had to be made before the plane could legally fly.