Should he shave his beard so that he can become a pilot?

I would like to become a pilot and I almost starting my training but there is a big problem for me and I would like to know what scholar like Cheikh El 'Uthaymin or Cheikh Bin Baz (rahimahoullah) and others say about this issue. hair defeats the purpose of the seal around the pilot's oxygen mask. The pilot just cannot depend on getting an adequate flow of oxygen or on keeping smoke or fumes out in a situation requiring the mask's use." I have flown many times Saudia Airline or other muslim companies and any pilots had a beard even a small one (I mean trim). What is the position of the scholars about beard and pilots because if it's not muslim who flight their plane do we have to call kouffar for that.