Seven-hour, 54-minute space walk second longest in U.S. Only unexpected problem occurred when Hoffman and Musgrave had difficulty closing compartment doors after replacing RSUs. On flight day four, first EVA team of Musgrave and Hoffman performed EVA #1, replacing two Rate Sensing Units (RSUs), each housing pair of gyroscopes two Electronic Control Units which direct the RSUs and eight electrical fuse plugs. After each servicing task completed, STOCC controllers verified electrical interfaces between replacement hardware and telescope. Throughout mission, commands to Hubble issued from Space Telescope Operations Control Center (STOCC) at Goddard Space Flight Center. Hubble rendezvous, grapple and berthing occurred on flight day three, with Nicollier using the remote manipulator system arm to position the 43-foot (13-meter) long Hubble upright in payload bay. In many instances, tasks were completed sooner than expected and a few contingencies that did arise were handled smoothly. During a record five back-to-back space walks totaling 35 hours and 28 minutes, two teams of astronauts completed the first servicing of the Hubble Space Telescope (HST). ![]() The final shuttle flight of 1993 was one of most challenging and complex manned missions ever attempted. ![]() 1 was scrubbed due to out-of-limit weather conditions at the Shuttle Landing Facility in the event of a return-to-launch-site contingency. Launch originally scheduled to occur from Launch Pad 39A, but after rollout, contamination was found in the Pad 39A Payload Changeout Room and a decision was made to move the shuttle and payloads to Pad 39B. Tom Akers, Mission Specialist Launch Highlights Mission Duration: 10 days, 19 hours, 58 minutes, 37 seconds Landing Site: Kennedy Space Center, Florida
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