Elliott Investment Management still wants to replace Southwest Airlines Co. Chief Executive Officer Bob Jordan, according to a union official, suggesting changes the carrier has already promised aren’t enough to satisfy the activist shareholder.

Elliott Management wants Bob Jordan out as Southwest Airlines (NYSE:LUV) CEO and executive chairman Gary Kelly to leave sooner than planned, according to a memo viewed by Reuters. The activist investor told members of the carrier’s top union that despite a board refresh and efforts by Southwest (LUV) to appease Elliott,