SAFETY Safety in general, but flight safety in particular, is of paramount importance to SZV-MAF. Aviation Operations Manual (AOM) As a result of our collaboration with the MAF-US, we use their AOM as our norm and, once every three years, our company undergoes an inspection by the Standards & Safety Cie. of MAF-US. Proficiency Flight Review (PFR) Our pilots, too, except by CASAS, undergo an inspection by MAF-US once every six months by completing a PFR test.