▁Sky ▁J oint ▁Technology ▁In iti ative . ▁On ▁ 8 ▁July ▁ 2 0 1 5 , ▁an ▁A TR ▁ 7 2 - 6 0 0 ▁' green ' ▁technology ▁demonstr ator ▁performed ▁its ▁first ▁flight ; ▁the ▁demonstr ator ▁was ▁used ▁for ▁testing ▁new ▁composite ▁materials ▁for ▁ins ulation , ▁air ▁condition ing ▁systems , ▁elect rical ▁distribution ▁systems , ▁and ▁energy ▁dispers al ▁modifications ▁to ▁evaluate ▁their ▁effect ▁on ▁the ▁aircraft ' s ▁overall ▁efficiency ▁as ▁a ▁contribution ▁to ▁the ▁C lean ▁Sky ▁initi ative . ▁A TR ' s ▁senior ▁vice - pres ident ▁for ▁engineering ▁Aless andro ▁Am end ola ▁indicated ▁that ▁the ▁elim ination ▁of ▁all ▁uses ▁of ▁ble ed ▁air ▁was ▁a ▁key ▁aim ▁in ▁the ▁design ing ▁of ▁an ▁all - elect ric ▁architecture ▁as ▁well ▁as ▁impro ving ▁engine ▁efficiency ; ▁the ▁minim ising ▁of ▁peak ▁elect rical ▁loads ▁was ▁also ▁a ▁stated ▁priority . ▁During ▁March ▁ 2 0 1 6 , ▁a ▁second ▁round ▁of ▁flight ▁tri als ▁dedicated ▁the ▁testing ▁of ▁all - elect ric ▁systems ▁architecture ▁using ▁the ▁demonstr ator ▁was ▁completed ; ▁analysis ▁is ▁set ▁to ▁continue . ▁ ▁The ▁current ▁production ▁version ▁is ▁the ▁A TR ▁ 7 2 - 6 0 0 ▁series . ▁On ▁ 2 ▁October ▁ 2 0 0 7 , ▁A TR ▁CE O ▁St é ph ane ▁May er ▁announced ▁the ▁launch ▁of ▁the ▁− 6 0 0 ▁series ▁aircraft ; ▁the ▁A TR ▁ 4 2 – 6 0 0