There's a website about the Lady Be Good
here. The outbound flight from North Africa to Naples was frustrated by strong winds and sandstorms, so the crew ditched their bombs and came home; although the navigator put them on the right course, the winds made him misjudge the distance, and the bomber flew over its home base in the darkness and kept going into the desert. The crew bailed out in pitch darkness, with no idea where they were. One of them was killed when his parachute failed, but the others survived eight days in the desert. All but one of the bodies were recovered in 1959/60; Staff Sgt Vernon Moore remains missing. They walked far enough to have got back to base, or to a nearby oasis, but they walked in the wrong direction.
There's a photograph of the bomber's remains, taken in 1959 - it looks to have made a decent belly-landing of its own accord, although the crew would not have known this before they bailed out. If they had found the bomber they might have been able to bolster their water supplies, although I doubt the bomber had enough water to last until 1959!
Surprisingly, the anecdote about the armrest appears to be
true. There's even more thorough coverage
here . As is typically the case, Wikipedia's entry is a poorly-formatted mishmash of the above.