Originally Posted by
LarryJ
The only airplane that I know of with a roof hatch is the Saab 340.
More common than you think. 747, Do-328, and I believe the Dash-8, CRJs, and ERJs.
At one company I worked for on the 727, the f/o was supposed to exit the most rear-ward exit. Usually the aft airstairs. It made absoutely no sense, the f/o has to climb over the f/e and then go aft rather than going out his window exit.