▁H . ▁W . ▁Mack lean . ▁Joe ▁B aug her ▁c ites ▁crash ▁date ▁of ▁ 2 4 ▁June . ▁July ▁First ▁prototype ▁of ▁two ▁M its ub ishi ▁ 1 M F 1 0 , ▁( M its ub ishi ▁Navy ▁Ex perimental ▁ 7 - Sh i ▁Car rier ▁F ighter '' '), ▁completed ▁at ▁the ▁end ▁of ▁February ▁ 1 9 3 3 , ▁crashes ▁on ▁test ▁flight ▁out ▁of ▁K ag am ig ah ara ▁due ▁to ▁struct ural ▁failure ▁of ▁vertical ▁fin . ▁M its ub ishi ▁test ▁pilot ▁Y osh it aka ▁K aj ima ▁successfully ▁b ails ▁out . ▁▁ 2 5 ▁July ▁March ▁Field , ▁California , ▁suff ers ▁its ▁worst ▁accident ▁to ▁date ▁when ▁S ikor sky ▁C - 6 A ▁am ph ib ian , ▁ 3 0 - 3 9 9 , ▁of ▁the ▁ 6 4 th ▁Service ▁Squadron , ▁en ▁route ▁from ▁R ivers ide ▁to ▁Rock well ▁Field , ▁San ▁Diego , ▁sh eds ▁the ▁star board ▁wing ▁in ▁flight ▁when ▁a ▁wing ▁str ut ▁fails ▁and ▁crashes ▁in ▁a ▁h ollow ▁on ▁the ▁edge ▁of ▁the ▁city ▁limits ▁of ▁O ce ans ide , ▁killing ▁all ▁seven ▁ab o ard . ▁Although ▁the ▁w reck age ▁and ▁mang led ▁bodies ▁are ▁d rench ed ▁in ▁gas oline ▁after ▁the ▁crash , ▁the ▁pilot ▁apparently ▁shut ▁off ▁the ▁switch es ▁before ▁impact ▁and ▁there ▁is ▁no ▁fire . ▁Dead ▁are ▁pilot ▁L t . ▁Carl ▁H . ▁Murray