4 th ▁Test ▁Squadron ▁at ▁Hill ▁A FB , ▁Ut ah ▁in ▁Jan . ▁ 1 9 8 7 ▁and ▁used ▁as ▁electronic ▁test bed ▁and ▁cargo ▁transport ; ▁aircraft ▁retired ▁January ▁ 1 9 9 4 ▁with ▁ 1 1 , 0 0 0 + ▁flight ▁hours ▁and ▁moved ▁to ▁Hill ▁A eros pace ▁Museum ▁at ▁Hill ▁A FB ▁by ▁January ▁ 1 9 9 4 . ▁ ▁C - 1 3 0 E , ▁AF ▁Ser . ▁No . ▁ 6 2 - 1 7 8 7 , ▁on ▁display ▁at ▁the ▁National ▁Museum ▁of ▁the ▁United ▁States ▁Air ▁Force , ▁Wright - P atter son ▁A FB , ▁Ohio , ▁was ▁flow n ▁to ▁the ▁museum ▁on ▁ 1 8 ▁August ▁ 2 0 1 1 . ▁One ▁of ▁the ▁greatest ▁fe ats ▁of ▁hero ism ▁during ▁the ▁Vietnam ▁War ▁involved ▁the ▁C - 1 3 0 E , ▁call ▁sign ▁" Sp are ▁ 6 1 7 ". ▁The ▁C - 1 3 0 E ▁attempted ▁to ▁a ird rop ▁am mun ition ▁to ▁surrounded ▁South ▁Vietnam ese ▁forces ▁at ▁An ▁Loc , ▁Vietnam . ▁Appro aching ▁the ▁drop ▁zone , ▁Sp are ▁ 6 1 7 ▁received ▁heavy ▁enemy ▁ground ▁fire ▁that ▁dam aged ▁two ▁engines , ▁ru pt ured ▁a ▁ble ed ▁air ▁du ct ▁in ▁the ▁cargo ▁compart ment , ▁and ▁set ▁the ▁am mun ition ▁on ▁fire . ▁Fl ight ▁engineer ▁T S gt ▁Sand ers ▁was ▁killed , ▁and ▁navig ator ▁ 1 st