jimf671. The doors on all Pumas are the result of the original French Army requirement that the Puma would be low enough to go into a Transall and narrow enough to be transported on a French railway truck. The Pumas have been saddled with that restriction over decades.
When you climb into a 747/737/A320 and sit in a seat with lots of legroom that has the escape exits by it the hostie will ask you to familiarise yourself with the operation of the said door in case you have to operate it in an emergency. The escape and dunking drills I have done, both military and civil in different continents have also emphasised this detail. I find it very strange that with this accident that one main door was not jettisoned thereby trapping people inside.