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

                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.
Praise be to Allah.It is not permissible 
  to shave the beard or to remove any part of it, because the Prophet  
  (peace and blessings of Allaah be upon him) said according to al-Sihaah: “Let your beards grow.”And there are other ahaadeeth; for more information see Question 
  #1189.
 There 
  are pilots who have beards; having a beard does not prevent one from flying 
  planes, whether they are civil or military. You should remember that a person 
  will be resurrected as he died, so when you are resurrected in sha Allaah with 
  the Messenger of Allaah and his Sahaabah and the believers, would you like to 
  be beardless when they all have beards? May Allaah help you to do that which 
  He loves and which pleases Him.