Maybe! Not sure what it was. All I know was that a

Maybe! Not sure what it was. All I know was that a large group entered the plan 10+ then about 15 mins later another large group 10-20 entered the plane. Then all the shades started being pulled down on the windows. The Fire Department Crash Truck responded with lights on! The LED lights on the exit doors came on for a short period then off. Stairs then backed off of main door. 10 mins of dark plane. Then main door opened and stairs back to door. Looks like a maintenance work came out of the plane then hopped on a boom lift under one wing. Went from there to back inside 3-4 times. Then the planes lights and engines went completely off besides 4 white lights where the wing attaches to the fuselage. 20 mins or so later main door opens and everyone exits down stairs. Looked like someone at the top directing them down. 10 mins later crash truck leaves and crews start moving thing outside. That's when I left.