man ▁R Q - 4 ▁Global ▁Haw k ), ▁which ▁required ▁long - end urance ▁at ▁up ▁to ▁ 7 0 , 0 0 0 ft ▁( 2 1 , 3 0 0 m ). ▁It ▁was ▁tested ▁at ▁these ▁alt itudes ▁in ▁February ▁ 1 9 9 6 ▁at ▁the ▁Arnold ▁Engineering ▁Development ▁Center ▁in ▁Tennessee ▁and ▁the ▁first ▁was ▁delivered ▁in ▁May ▁ 1 9 9 6 . ▁ ▁More ▁than ▁ 3 , 4 0 0 ▁engines ▁have ▁been ▁delivered . ▁In ▁ 2 0 1 4 , ▁ 2 , 9 7 6 ▁civil ▁engines ▁were ▁installed . ▁In ▁ 2 0 1 7 , ▁the ▁A E ▁ 3 0 0 7 ▁in ▁the ▁ER J ▁family ▁had ▁fle w ▁over ▁ 5 3 ▁million ▁hours ▁and ▁over ▁ 4 4 ▁million ▁cycles . ▁It ▁was ▁flow n ▁for ▁more ▁than ▁ 6 0 ▁million ▁hours . ▁ ▁Design ▁ ▁The ▁A E ▁ 3 0 0 7 ▁is ▁a ▁direct ▁drive ▁tur bo fan ▁engine ▁with ▁a ▁single ▁stage ▁fan , ▁a ▁ 1 4 - stage ▁ax ial ▁compress or ▁with ▁ 6 ▁stages ▁of ▁variable ▁van es ▁including ▁in let ▁guide ▁van es , ▁an ▁ann ular ▁comb ust or , ▁a ▁two - stage ▁high ▁pressure ▁tur bine ▁and ▁a ▁ 3 - stage ▁low ▁pressure ▁tur bine . ▁The ▁access ory ▁g ear box ▁is ▁mounted ▁at ▁its ▁bottom ▁and ▁two ▁single ▁channel ▁FA DE C ▁units ▁are ▁mounted ▁in ▁the ▁aircraft .