Don't worry, you did fine with the description. It's a fine line to walk between giving too much detail and just enough. If you're asked about the scene, then you can always elaborate. My view has always been that if you want the characters to be observant, get them to ask questions. The one asked was a good one though. It gives me the impression that it's a private hanger for an aircraft storage and maintenance. There's probably a crew to take care of the aircraft once it's in the hanger and clean up afterward... so, MY question is... where is the crew that'll guide the aircraft in and secure the aircraft... you know, putting down blocks, and so on?