The crank out window in the kitchen is, like QCMan suggests, probably to allow cooking in the rain. However, the different styles on the overhead bunk (crank out on the left/slider on the right) is perplexing to me. Wonder why the manufacturer did that?
BTW, sliders are manufactured in both directions as well. However, as others have suggested, you should be able to fix/rebuild the crank mechanism relatively cheaply.
We don't stop playing because we grow old...We grow old because we stop playing!
2004 Itasca Sunrise M-30W
Carson enclosed ATV Trailer
-'85 ATC250R, '12 Husky TE310, '20 CanAm X3 X rs Turbo RR
Zieman Jetski Trailer
-'96 GTi, '96 Waveblaster II