tonytales --
Your comment about Aramco's superb maintenance of their aircraft squares with my family's memories of how finicky Aramco was about maintaining their airplanes. Nice to have that confirmed. And what you wrote about the aft toilets in the DC-4s is soooo funny!
I remember being told long ago that DC-4s were not pressurized. Is that true? If not, how could they have had what Wikipedia claims is a service ceiling of 22,300 feet without everyone on board needing oxygen? And -- if DC-4s were, indeed, pressurized, how did their aft toilet flush without depressurizing the airplane?