Malila Prado has just published an article on how Brazilian pilots view English language learning. You can download the article (in Portuguese) for free here. The abstract is available in Portuguese and in English.
Prado, M. (2012). A representação de língua e aprendizagem do sujeito-aprendiz do inglês para aviação. [Perceptions of learners of Aviation English of language and their own learning process]. Aviation in Focus, 3 (1), 20-33.