Concerning the 737 overhead panel. time and time again I have heard if they change that panel it's going to require a new type rating. But frankly I think that excuse is a load of hog wash. If the b717 can maintain a common type rating with the dc9 why the hell can't the 737 do the same. In my opinion it comes down to SWA forcing boeing to keep the legacy panel in-place to maintain SWA fleet commonality.