. ▁After ▁off loading , ▁the ▁tank ▁was ▁transport ed ▁into ▁a ▁checkout ▁cell ▁inside ▁the ▁V AB ▁on ▁ 1 4 ▁July ▁ 2 0 1 0 . ▁ ▁NASA ▁initially ▁planned ▁for ▁ST S - 1 3 4 ▁( End e av our ) ▁to ▁fly ▁with ▁the ▁newer ▁E T - 1 3 8 ▁and ▁for ▁the ▁L ON ▁ST S - 3 3 5 ▁( At lant is ) ▁mission ▁to ▁util ize ▁the ▁ref urb ished ▁E T - 1 2 2 ▁only ▁in ▁the ▁event ▁that ▁a ▁rescue ▁of ▁Ende av ours ▁crew ▁were ▁required . ▁During ▁H urr icane ▁K atr ina , ▁E T - 1 2 2 ▁was ▁dam aged ▁at ▁the ▁Mich oud ▁Assembly ▁Fac ility ▁( MA F ) ▁in ▁New ▁Orleans ▁and ▁while ▁the ▁tank ▁was ▁cert ified ▁as ▁completely ▁flight - worth y ▁after ▁its ▁rep airs ▁were ▁completed , ▁NASA ▁management ▁ruled ▁that ▁E T - 1 2 2 ▁pos ed ▁a ▁slightly ▁higher ▁risk ▁of ▁losing ▁fo am ▁from ▁the ▁rep a ired ▁areas ▁and ▁therefore ▁assigned ▁it ▁to ▁the ▁ST S - 3 3 5 ▁mission ▁that ▁would ▁likely ▁never ▁fly . ▁However , ▁once ▁it ▁was ▁decided ▁to ▁fly ▁Atl ant is ▁on ▁a ▁full ▁ST S - 1 3 5 ▁mission , ▁the ▁tank ▁assign ments ▁were ▁sw apped ▁so ▁that ▁in ▁the ▁event ▁ST S - 1 3 4 ▁( End e av our ) ▁were ▁to ▁suffer ▁damage ▁from ▁E T - 1