Atlantis blasted off on a night launch to Mir, docking with the station on May 17 at 02:33 GMT. Jerry Linenger, who had begun his stay on Mir in mid-January aboard STS-81, would return aboard STS-84. Michael Foale would be left at the station for his stint as the American crew member of Mir. The crew transfered to Mir 466 kg of water, 383 kg of U.S. science equipment, 1,251 kg of Russian equipment and supplies, and 178 kg of miscellaneous material. Returned to Earth aboard Atlantis were 406 kg of U.S. science material, 531 kg of Russian logistics material, 14 kg of ESA material and 171 kg of miscellaneous material. Atlantis undocked from Mir at 01:04 GMT on May 22. After passing up its first landing opportunity due to clouds over the landing site, the Shuttle fired its OMS engines on the deorbit burn at 12:33 GMT on May 24. Atlantis landed at 13:27 GMT at Kennedy Space Center's runway 33.
Atlantis was launched from Kennedy Space Center's Launch Complex 39B. Solid rocket boosters RSRM-75 and external tank ET-103 were used to loft the orbiter into space. The inital orbit of 72 x 328 km x 51.6 deg was circularised by the Shuttle's OMS engines at apogee.
Atlantis docked with the PMA-2 adapter on the International Space Station at 05:51 GMT on September 10. The orbiter's small RCS engines were used to gently reboost the station's orbit several times.
Astronauts Lu and Malenchenko made a spacewalk on September 11 beginning at 04:47 GMT. They rode the RMS arm up to Zvezda and began installing cables, reaching a distance of 30 meters from the airlock when installing Zvezda's magnetometer. Total EVA duration was 6 hours 21 minutes.
During their 12-day flight, the astronauts spent a week docked to the International Space Station during which they worked as movers, cleaners, plumbers, electricians and cable installers. In all, they spent 7 days, 21 hours and 54 minutes docked to the International Space Station, outfitting the new Zvezda module for the arrival of the Expedition One crew later this fall.
The Shuttle undocked from ISS at 03:44 GMT on September 18 and made two circuits of the station each lasting half an orbit, before separating finally at 05:34 GMT. The payload bay doors were closed at 04:14 GMT on September 20 and at 06:50 GMT the OMS engines ignited for a three minute burn lowering the orbit from 374 x 386 km x 51.6 deg to 22 x 380 km x 51.6 deg. After entry interface at 07:25 GMT, the orbiter glided to a landing on runway 15 at Kennedy Space Center with main gear touchdown at 07:56:48 GMT for a mission duration of 283 hr 11min.
Astronauts Lu and Malenchenko made a spacewalk on September 11 beginning at 04:47 GMT. They rode the RMS arm up to Zvezda and began installing cables, reaching a distance of 30 meters from the airlock when installing Zvezda's magnetometer.