cribed ▁approach ▁course . ▁ ▁At ▁ 2 2 : 4 2 , ▁while ▁conduct ing ▁the ▁first ▁approach , ▁the ▁crew ▁elected ▁to ▁abort ▁and ▁initi ate ▁a ▁go - around ▁procedure , ▁in ▁response ▁to ▁an ▁alert ▁from ▁the ▁on - board ▁wind she ar ▁warning ▁system . ▁They ▁clim bed ▁to ▁ 5 0 0 0   ft ▁( 1 5 0 0 ▁m ) ▁and ▁then ▁to ▁ 8 0 0 0   ft ▁( 2 4 5 0 ▁m ) ▁to ▁hold . ▁While ▁in ▁that ▁holding ▁pattern , ▁the ▁crew ▁reported ▁moder ate ▁ic ing ▁and ▁requested ▁further ▁clim b ▁to ▁F L ▁ 1 5 0 ▁( 4 5 5 0 ▁m ), ▁where ▁they ▁held ▁until ▁desc ending ▁again ▁for ▁a ▁second ▁approach ▁attempt . ▁ ▁During ▁the ▁second ▁approach , ▁the ▁crew ▁again ▁ab orted ▁and ▁initi ated ▁another ▁go ▁around ▁at ▁a ▁height ▁of ▁ 2 2 0 ▁meters ▁and ▁a ▁distance ▁of ▁ 4 . 5   km ▁from ▁the ▁run way ▁threshold . ▁The ▁vertical ▁speed ▁during ▁that ▁second ▁go - around ▁went ▁as ▁high ▁as ▁ 2 0   m / s , ▁while ▁engine ▁thrust ▁was ▁set ▁at ▁the ▁maximum ▁TO GA ▁limit ▁of ▁ 1 0 1 ▁– ▁ 1 0 2 % ▁( N 1 ). ▁ ▁The ▁second ▁go - around ▁decision ▁was ▁probably ▁prov oked ▁by ▁a ▁sudden ▁ 2 0 - k not ▁increase ▁of ▁indicated ▁speed ▁to ▁as ▁much ▁as ▁ 1 7