The article deals with the peculiarities of professional activity of aviation personnel working for multinational aviation companies and socio cultural factors influencing their work. It is stressed that socio and cross cultural issues may be the reason for misunderstanding in professional and everyday communication. Miscommunications may broadly be applied to a range of verbal communications problems ranging from misunderstandings, such as those due to ambiguity, language structure, to more technical problems. The authors underline that those misunderstandings may be due to cultural differences. Special attention is paid to professional radio communication between an air traffic controller and pilot, which is very important for promotion of flight safety. Studies indicate that miscommunication is a pervasive problem in air traffic control and, although infrequent when considered as a percentage of daily transactions, nevertheless, has been a causal factor in numerous fatal accidents. The conclusion is made about the importance of social factors influencing the choice of certain lexical units and functional styles in radio communication.