minute EVA, they also prepared cables and electrical connectors on the surface of the Kvant module for the May installation of the Mir Cooperative Solar Array. The array was stored on the surface of the Docking Module that was installed on Kristall last November. Atlantis Launched The U.S. Space Shuttle Orbiter Atlantis was launched from Kennedy Space Center on March 22 at 11:00 UTC for its sixteenth flight as STS-76. During the ascent phase, flight controllers detected a small leak in one of Atlantis's three redundant hydraulic systems, but after the system was shut off when Atlantis reached orbit, the leak stopped. The approximately 20% loss of that one system's hydraulic fluid would not adversely affect the mission because the hydraulic system would not be used again until the descent phase. Preparations for Docking During the first two days of the mission, Atlantis Commander Kevin Chilton and Pilot Richard Searfoss began jet firings to guide Atlantis's journey toward Mir. The crew prepared for the docking by checking out communications equipment and docking and alignment aids. They also activated Spacehab and began orbital operations for Biorack experiments. Mission Specialists Linda Godwin and Michael Clifford checked out the space suits and equipment for their upcoming EVA. Atlantis Approaches Mir On mission day 3, when Atlantis was within 8 miles of the station, Chilton fired the orbital maneuvering system engines in the terminal phase initiation burn. As the two spacecraft completed another orbit, Atlantis approached Mir from below along the R-bar, using rendezvous radar to track its approach rate and measure it's distance. Third Atlantis/Mir Docking Chilton took manual control at one-half mile below the Mir, executing a 180 degree yaw rotation to align Atlantis with the Docking Module on Kristall. He used the ODS centerline camera as an aid in refining and maintaining the alignment. At 12:34 UTC on March 24, he achieved contact, adding Atlantis to a space station complex that then totaled 230 tons. After confirmation of docking, leak checks and pressurization of the docking vestibule, the hatches were opened and the two crews greeted each other. Shortly afterward, the Atlantis crew installed ducts to aid in circulating air between the two spacecraft during the docking phase. Lucid Joins the Mir 21 Crew Shannon Lucid officially became a Mir 21 crew member at 12:30 UTC on March 24 after a joint "go" from the Russian and U.S. mission control centers.