▁allocated ▁more ▁than ▁ 5 0 ▁investig ators ▁to ▁work ▁on ▁the ▁case . ▁In ▁a ▁statement , ▁it ▁listed ▁" cre w ▁error , ▁technical ▁failure , ▁ad verse ▁weather ▁conditions ▁and ▁other ▁factors " ▁as ▁possible ▁reasons ▁for ▁the ▁crash . ▁T error ism ▁was ▁ruled ▁out ▁as ▁a ▁possibility ▁as ▁no ▁traces ▁of ▁explos ives ▁were ▁found . ▁ ▁Progress ▁ ▁On ▁ 2 0 ▁March , ▁investig ators ▁completed ▁a ▁survey ▁of ▁the ▁w reck age . ▁Russian ▁and ▁Em ir ati ▁exper ts ▁started ▁an ▁analysis ▁of ▁the ▁rad ar ▁data , ▁flight ▁crew – AT C ▁communic ations ▁and ▁meteor ological ▁information . ▁Both ▁flight ▁record ers ▁were ▁recovered ▁from ▁the ▁crash ▁site ▁and ▁delivered ▁to ▁the ▁Inter state ▁A viation ▁Committee ▁in ▁Moscow . ▁ ▁On ▁ 2 0 ▁and ▁ 2 1 ▁March , ▁investig ators ▁from ▁Russia , ▁the ▁United ▁Arab ▁Em ir ates ▁( U AE ) ▁and ▁France , ▁extracted ▁the ▁memory ▁modules ▁from ▁their ▁protect ive ▁cas ings ▁and ▁downloaded ▁the ▁data ▁from ▁both ▁the ▁flight ▁data ▁rec order ▁( F DR ) ▁and ▁the ▁co ck pit ▁voice ▁rec order ▁( CV R ). ▁Both ▁record ers ▁function ed ▁normally ▁until ▁the ▁time ▁of ▁impact . ▁While ▁their ▁outer ▁cas ings ▁sust ained ▁some ▁damage , ▁the ▁quality ▁of ▁both ▁record ings ▁was ▁good . ▁A ▁trans cript ▁of ▁the ▁communication ▁between ▁the ▁Captain ▁and ▁First ▁Officer ▁was ▁prepared , ▁as ▁the ▁data ▁was ▁analyz ed . ▁They ▁also ▁began