General Electric has delivered the 1,000th GE90-115B engine as it continues to ramp-up production in lock-step with Boeing’s move to a higher assembly rate for the 777 family.

The engine, first revealed as the GE90-11XB in May 1999, became the exclusive powerplant for the longer range 777-200LR and -300ER variants in July of that year. Since the first 777-300ER entered service in 2004, more than 1,500 GE90-115B engines have been ordered for the extended range family which also includes the 777 Freighter.

GE logged orders and commitments for 400 GE90-115Bs in 2011, exceeding the previous record year of 2007 when 250 orders were taken.

The engine maker says GE90 production levels “continue to grow with a backlog of 800 engines that will be delivered in the next four years.” The company expects to produce more than 180 GE90 engines in 2012, versus 170 engines in 2011. The production rate is expected to climb to 225 engines in 2014 as Boeing increases production rate from 7 aircraft per month to 8.3 in early 2013. The increased production rate will see 100 777s assembled each year, the vast majority of them which will be GE-powered.