21.   The spokesman said the hydraulic pump problem was unlikely to affect the mission.

22.   Minutes after takeoff Monday, an auxiliary power unit on a hydraulic pump malfunctioned.

23.   That engine powered a hydraulic pump to lower the nosewheel.

24.   The docking of Atlantis and Mir was jeopardized minutes after Atlantis took off when an auxiliary power unit on a hydraulic pump malfunctioned.

25.   The mission of the space shuttle Atlantis will proceed as planned despite a malfunctioning auxiliary power unit on a hydraulic pump, a NASA spokesman said Tuesday.