▁the ▁entire ▁large ▁aircraft ▁fleet . ▁After ▁and ▁extensive ▁review , ▁US ▁Forest ▁Service ▁and ▁The ▁Bureau ▁of ▁Land ▁Management ▁decl ined ▁to ▁renew ▁the ▁le ases ▁on ▁nine ▁C - 1 3 0 A ▁over ▁concerns ▁about ▁the ▁age ▁of ▁the ▁aircraft , ▁which ▁had ▁been ▁in ▁service ▁since ▁the ▁ 1 9 5 0 s , ▁and ▁their ▁ability ▁to ▁handle ▁the ▁forces ▁generated ▁by ▁aer ial ▁fire f ight ing . ▁ ▁More ▁recently , ▁an ▁updated ▁Ret ard ant ▁Aer ial ▁D elivery ▁System ▁known ▁as ▁R AD S ▁X L ▁was ▁developed ▁by ▁C oul son ▁A viation ▁USA . ▁That ▁system ▁consists ▁of ▁a ▁C - 1 3 0 H / Q ▁retro f itted ▁with ▁an ▁in - floor ▁dis charge ▁system , ▁combined ▁with ▁a ▁remov able ▁ 3 , 5 0 0 - ▁or ▁ 4 , 0 0 0 - g all on ▁water ▁tank . ▁The ▁combined ▁system ▁is ▁F AA ▁cert ified . ▁ ▁On ▁January ▁ 2 2 , ▁ 2 0 2 0 , ▁C oul son ' s ▁T ank er ▁ 1 3 4 , ▁an ▁EC - 1 3 0 Q ▁registered ▁N 1 3 4 CG , ▁crash ed ▁during ▁aer ial ▁fire f ight ing ▁operations ▁in ▁New ▁South ▁Wales , ▁Australia , ▁killing ▁all ▁three ▁crew ▁members . ▁The ▁aircraft ▁had ▁taken ▁off ▁out ▁of ▁RA AF ▁Base ▁Richmond , ▁and ▁was ▁supporting ▁fire f ight ing ▁operations ▁during ▁Australia ' s ▁un