They used stairs for a 747 and disembarked from the lower deck doors only. The main reason for keeping pax on the plane was that it is not a commercial airport,

They used stairs for a 747 and disembarked from the lower deck doors only. The main reason for keeping pax on the plane was that it is not a commercial airport, and cannot handle customs/immigration for an A380 sized (anything > 15 pax, actually) aircraft. Only when the two new planes were available did they moved pax to them.