▁was ▁ready . ▁▁ ▁The ▁ 5 8 th ' s ▁headquarters ▁was ▁moved ▁on ▁ 2 3 d ▁April . ▁ ▁Al most ▁immediately ▁upon ▁arrival , ▁the ▁groups ▁B - 2 9 s ▁were ▁ground ed ▁due ▁to ▁engine ▁fires , ▁which ▁were ▁caused ▁by ▁the ▁engines ▁not ▁being ▁designed ▁to ▁operate ▁at ▁ground ▁temper atures ▁higher ▁than ▁ 1 1 5 ▁degrees ▁F , ▁which ▁were ▁typically ▁exceed ed ▁in ▁India . ▁ ▁Mod ifications ▁had ▁to ▁be ▁made ▁to ▁the ▁engines ▁and ▁also ▁to ▁the ▁cow l ▁f laps . ▁After ▁these ▁modifications , ▁B - 2 9 ▁fl ights ▁were ▁res umed . ▁ ▁From ▁India , ▁the ▁ 4 0 th ▁Bomb ▁Group ▁planned ▁to ▁fly ▁miss ions ▁against ▁Japan ▁from ▁air fields ▁in ▁China . ▁ ▁H sin ch ing ▁Air field ▁( A - 1 ), ▁located ▁just ▁to ▁the ▁south west ▁of ▁Ch end u ▁in ▁south - central ▁China ▁was ▁designated ▁as ▁the ▁forward ▁st aging ▁base ▁for ▁the ▁group . ▁ ▁However , ▁all ▁the ▁supplies ▁of ▁fuel , ▁bomb s , ▁and ▁sp ares ▁needed ▁to ▁support ▁operations ▁from ▁K w ang han ▁had ▁to ▁be ▁flow n ▁ 1 , 2 0 0 ▁miles ▁from ▁India ▁over ▁" The ▁H ump " ▁( the ▁name ▁given ▁by ▁Al lied ▁pil ots ▁to ▁the ▁eastern ▁end ▁of ▁the ▁H imal ay an ▁Mountains ), ▁since ▁Japanese ▁control ▁of ▁the ▁se as ▁around ▁the ▁Chinese ▁coast ▁made ▁se abor ne ▁supply ▁of