The C-131 was old and slow, but it was a very comfortable, stable airplane. In 1972-73 when Bendix was developing the first TCAS, we used one with specially calibrated altimeters to run head on passes against a C-135 starting with 2,000 ft. vertical separation, and working our way down to 500 ft. It was an eye opener.
But I digress. Hope both the guys in the hospital do well.