p ▁to ▁achieve ▁improved ▁" hot ▁and ▁high " ▁take off ▁performance . ▁It ▁can ▁land ▁and ▁take off ▁in ▁high ▁air ports ▁with ▁short ▁run ways ▁like ▁the ▁And or ra ▁Airport . ▁It ▁emp lo ys ▁carbon f ib res ▁for ▁ 3 0 % ▁of ▁the ▁wing ▁by ▁weight , ▁for ▁a ▁ 2 0 % ▁weight ▁reduction . ▁ ▁In ▁a ▁standard ▁configuration , ▁the ▁aircraft ▁does ▁not ▁have ▁an ▁auxili ary ▁power ▁unit ; ▁when ▁present ▁it ▁is ▁installed ▁within ▁the ▁C 4 ▁cargo ▁section . ▁Most ▁operators ▁of ▁the ▁A TR ▁ 7 2 ▁equip ▁their ▁aircraft ▁with ▁a ▁prop eller ▁bra ke ▁( re ferred ▁to ▁as ▁" Hot el ▁Mode ") ▁that ▁stops ▁the ▁prop eller ▁on ▁the ▁No . ▁ 2 ▁( right ) ▁engine , ▁allowing ▁the ▁tur bine ▁to ▁continue ▁running ▁and ▁provide ▁both ▁air flow ▁and ▁elect rical ▁power ▁to ▁the ▁aircraft ▁while ▁on ▁the ▁ground . ▁ ▁In ▁the ▁majority ▁of ▁configurations , ▁passengers ▁board ▁the ▁A TR ▁ 7 2 ▁using ▁the ▁rear ▁door , ▁a ▁relatively ▁unusual ▁configuration ▁for ▁a ▁passenger ▁aircraft , ▁while ▁the ▁front ▁door ▁is ▁typically ▁used ▁for ▁the ▁loading ▁and ▁un loading ▁of ▁cargo ; ▁early ▁customer ▁Fin na ir ▁intention ally ▁ordered ▁its ▁A TR ▁ 7 2 s ▁with ▁a ▁front ▁passenger ▁door ▁so ▁that ▁it ▁could ▁util ize ▁the ▁jet ▁brid ges ▁at ▁Hels ink i ▁Airport , ▁while ▁operator ▁Air ▁New ▁Zealand ' s ▁standard ▁rear ▁door ▁aircraft ▁can ▁use