21st
I don't recall Bell discussing compressor stalls in categories of being a 'normal problem" and a "normal occurrence."
Your confusing 'normal problem/occurrence' explanation would have perhaps helped out their tap-dancing ‘Spokesman’ when he needed it though.
The public doesn’t care nor needs to know how/what/why about compressor stalls occur on military or civilian A/C. The point is that Bell made a ludicrous statement that included ALL A/C worldwide and what the public should expect, i.e., "They are very normal." Really?!
So AGAIN, the point is if they make such asinine statements about this, what other asinine statements have they fed to the unknowing public?