Boeing allowed aviation fans unique factory tours during a February convention . Gulp . ` ` Avgeeks '' toured factories for 737 , 737 , 777 and 737 aircraft . Growing avgeek community on the social media .
Boeing allowed aviation fans unique factory tours during a February convention . ` ` Avgeeks '' toured factories for 737 , 737 , 777 and 737 aircraft . Growing avgeek community on the social media .