Early '50's, possibly very late '40's. B&W. Title & actors uknown. Starts with the monitoring of a plane crash from a radio station. Station radio direction finders indicate crash happening in the Himilayas and/or Nepal. Movie is story of expedition to find crash and maybe possible survivors. Lots of images of local Buddist culure. Don't remember any more as I was only 5 or 6 when I saw it in theater. Please help!