Complex sentence: The new company announced in July 2008 that they intended to restart production by the end of 2009 at the previous plant in Trois Riveries, with a plan to produce 15 aircraft in 2009 and ramp up production to 50 to 80 per year by 2012.
Split into simpler sentences: The new company announced in July 2008 that they intend to restart production by the end of 2009 at the previous plant in Trois Riveries. They intend to produce 15 aircraft in 2009 and will ramp up production to 50 to 80 per year by 2012.