According to paragraph 2, it is correct to say that...

aircraft technicians and flight personnel are submitted to equal time pressure when they need to react to English language commands.

both airline crews and maintenance personnel are subject to English language misunderstandings that can cause critical mishaps.

aircraft maintenance personnel usually seem puzzled in discussions with native speakers about the need to use principles of Simplified English.

it is widely known that several major accidents have been caused by linguistic misunderstandings during aircraft maintenance procedures.