3 ) ▁two - se at ▁bi plane , ▁first ▁flow n ▁Aut umn ▁ 1 9 2 7 ▁and ▁re built ▁twice ▁with ▁different ▁power pl ants , ▁written ▁off ▁this ▁date ▁in ▁a ▁fatal ▁crash .( D AR ▁– ▁Der z hav na ▁Aer op l anna ▁Rab ot il n its a ▁– ▁State ▁Air plane ▁Work shop ) ▁▁▁ 1 6 ▁February ▁Cr ash ▁of ▁Curt iss ▁A - 1 2 ▁Sh rike , ▁ 3 3 - 2 4 4 , ▁in ▁bad ▁weather ▁at ▁Oak ley , ▁Ut ah , ▁k ills ▁two ▁crew , ▁ 2 d ▁L t . ▁Jean ▁Don ant ▁Gren ier , ▁from ▁Fort ▁Cro ck ett , ▁Texas , ▁and ▁crew mate ▁ 2 d ▁L t . ▁Ed win ▁D . ▁White ▁Jr ., ▁ 2 3 , ▁attached ▁to ▁March ▁Field , ▁California , ▁while ▁flying ▁an ▁advance ▁route ▁to ▁determine ▁time ▁and ▁distance ▁for ▁carrying ▁the ▁mail ▁between ▁Salt ▁Lake ▁City ▁and ▁Che y enne , ▁Wy oming . ▁Their ▁plane ▁came ▁down ▁in ▁a ▁can y on ▁during ▁a ▁snow st orm . ▁" The ▁plane ▁flow n ▁by ▁the ▁two ▁men ▁crash ed ▁in ▁a ▁bl inding ▁snow ▁storm ▁ 6 0 ▁miles ▁east ▁of ▁Salt ▁Lake ▁in ▁Sum mit ▁county , ▁ 3 0 ▁miles ▁south ▁of ▁the ▁Ut ah - W y oming ▁line ." ▁Or son ▁Max well , ▁a ▁min er , ▁found ▁the ▁crew ▁dead ▁in ▁their ▁co ck p its