This specification e s t a b l i s h e s the requirements for the
manufacture and acceptance of a v e n t i l a t o r to be used w i t h and form part of
the P r o t e c t i v e Assembly, H e l i c o p t e r Aircrewman, Chemical, B i o l o g i c a l ,
R a d i o l o g i c a l (PASS).