He tried that, it didn't work.....
How do we know? He was alone and may have tried again.
Here is an image from the movie..
There were some differences,
NORJAK was at a higher speed.
NORJAK had the "emergency" Airstair system deployed
NORJAK had the side panels.
Notice in the movie he went down the Airtairs on his knees backwards and if he had stood up at the end of the stairs his head would hit the top. He also used both hands to grip the rails. I believe that because NORJAK speed was higher and the technical differences in activating the "emergency" system that the opening at the end was much smaller with the hijacker at the end.