From Airvectors.net—
“There were two crew in a tandem cockpit with an enclosed canopy. The pilot sat forward, with an observer in the back; a 7.62-millimeter (0.30-caliber) Browning machine gun could be fitted on a flexible mount on the rear of the cockpit for defense. The two crew had their own sliding canopy sections for getting in and out, with handholds on the sides of the fuselage to allow them to get up and down. There was a hold beneath the observer's position for two passengers. There was access to the hold through the rear cockpit, and a sliding window on each side. Some sources claim a third seat could be fitted in the cockpit for a radio operator if the rear machine gun weren't fitted, but it would seem like a tight fit.”
I believe I have seen photos of men on the wings during a rescue but I am not sure.
