The Hawk was shot down and destroyed in the Revan novel. Not on Dormund Kaas but on another planet Revan was visiting. When he and T7 took off they were attacked by Scourge and Darth Nyriss. The ship crashed and was badly damaged. Since neither Meetra nor Revan nor T7 had survived the novel nobody knew where the Ebon Hawk had crashed.
T7? Don't you mean T3-M4?
Unless there is a T7-01.