Complex sentence: In 2010, Boeing transitioned to a production rate of 10 C-17s per year from a high of 16 per year; this was due to dwindling orders and to extend the life of the production line while additional international orders were sought.
Split into simpler sentences: In 2010, Boeing reduced their production rate to 10 C-17s per year from a high of 16. This was due to dwindling orders and to extend the life of the production line while additional international orders were sought.