[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"legacy-detail-army-677.10":3},{"code":4,"branch":5,"codeSystem":6,"events":7},"677.10","army","MOS",[8],{"title":9,"status":10,"effectiveFrom":11,"effectiveTo":12,"successors":13,"citations":16,"notes":23},"Aircraft Mechanic — CH-37","converted",null,"1965",[14],{"code":15,"liveCode":11,"name":11},"67T20",[17],{"title":18,"url":19,"accessedAt":20,"sourceDate":21,"locator":22},"U.S. Army Aviation Digest, March 1966, vol. 12, no. 3, “New Enlisted Aviation MOS”","https://archive.org/details/sim_united-states-army-aviation-digest_1966-03_12_3/page/n24/mode/1up","2026-07-30","1966-03","“New Enlisted Aviation MOS,” printed pp. 22–23; PDF pp. 24–25","The article maps 677.10 CH-37 crew chief/aircraft mechanic to 67T20 in both the opening paragraph and the Old/New table; the duplicate assertion is reconciled into this single row. Change 15 directed active-duty personnel conversion during 1–25 July 1965; effectiveTo is conservatively recorded at year precision rather than assigning one uniform individual conversion date."]