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STORY WRITTEN FOR & USED WITH PERMISSIONPosted: September 13, 2006Canadian astronaut Steve MacLean ran into the same problem today that spacewalker Joe Tanner encountered Tuesday: a lost bolt from a thermal cover on a newly installed solar array truss. Unlike Tanner, MacLean never saw the spring-loaded bolt separate from its retaining clip and float away. One minute it was there, the next it was gone."OK, on cover eight, a bolt is missing," MacLean radioed. "Bolt alpha. I did not see it go.""OK, Steve, I copy that, bolt 1 alpha is missing," Heidemarie Stefanyshyn-Piper replied from inside the shuttle-station complex.MacLean and Dan Burbank were in the process of removing 12 launch locks on a massive rotary joint that ultimately will move the station's port-side solar arrays to track the sun as the station circles the globe.The solar alpha rotary joint was launched with its main gear locked in place. To remove the launch locks, thermal covers held in place by four spring-loaded bolts have to be moved aside. The covers are reinstalled after the locks are removed.The attachment hardware is designed to stay in place. But during a spacewalk Tuesday, a retaining clip apparently failed, or was knocked off its threads, and the clip and bolt floated away. Tanner was initially worried some of the hardware might have floated inside the SARJ but flight controllers dismissed that concern, saying they were confident the bolt and washer floated away from the station.Based on Tanner's experience, MacLean and Burbank were taking special care not to put any stress on the bolt hardware as they worked through the removal of the remaining 12 launch locks. MacLean even kept an eye out for the bolt that vanished Tuesday."Heide and Joe, I've been looking all along for that bolt," he radioed at one point. "Haven't seen anything."He was in the process of re-attaching a thermal cover when he noticed one of his bolts had disappeared."I'm standing by for your words," MacLean radioed after reporting the lost bolt. "Would you like me to remove the cover and take a look inside? The cover is tacked on right now with three bolts."Flight controllers asked him to do just that, adding "we're just specifically concerned about whether the washer is still there.""OK, the cover is removed again, slowly turning it around," MacLean said a few moments later. "And the washer is gone."Looking inside the truss, he reported seeing "nothing at all that looks like a washer." He then re-attached the thermal cover with the three remaining bolts and pressed ahead.Assuming the spacewalk stays on schedule, flight controllers plan to begin activating the SARJ around 11:15 a.m. If no problems are found, a drive motor will begin turning the main gear about an hour later to rotate a new, still-stowed set of solar arrays 180 degrees. That will put the P4 solar array blanket boxes in the proper position for deployment Thursday.As part of its initial checkout, the SARJ will actually rotate the outboard P4 array truss a full 360 degrees before reversing direction and moving back to the 180-degree position.Flight controllers plan to extend the panels a few feet late this evening. On Thursday, the astronauts will complete the job, sending commands that will cause a motorized mast to extend, pulling the folded solar panels from their boxes like venetian blinds. Fully extended, the arrays will stretch 240 feet from tip to tip.Additional coverage for subscribers:VIDEO:STEP-BY-STEP PREVIEW OF SPACEWALK NO. 2 VIDEO:POST-EVA 1 STATUS BRIEFING VIDEO:TANNER LOSES BOLT DURING ROTARY JOINT WORK VIDEO:PIPER UNFOLDS SOLAR BLANKET BOXES VIDEO:SECOND WING'S STRUCTURE DEPLOYED BY PIPER VIDEO:FIRST SOLAR WING'S STRUCTURE DEPLOYED BY TANNER VIDEO:STEP-BY-STEP PREVIEW OF SPACEWALK NO. 1 VIDEO:TRUSS HANDED FROM SHUTTLE ARM TO STATION ARM VIDEO:ARM MANEUVERS TRUSS OVER SHUTTLE WING VIDEO:TRUSS SLOWLY LIFTED OUT OF PAYLOAD BAY VIDEO:ATLANTIS' ARM GRAPPLES THE TRUSS VIDEO:MONDAY'S MISSION STATUS BRIEFING VIDEO:ATLANTIS WELCOMED ABOARD THE STATION VIDEO:DOCKING REPLAY FROM CAMERA ON SHUTTLE ARM VIDEO:SHUTTLE ATLANTIS DOCKS TO THE STATION VIDEO:ATLANTIS' BREATH-TAKING FLIP MANEUVER VIDEO:CREW'S CAMCORDER FOOTAGE OF EXTERNAL TANK VIDEO:NARRATED ANIMATION PREVIEWING TRUSS UNBERTHING VIDEO:NARRATED ANIMATION PREVIEWING THE DOCKING VIDEO:NARRATED ANIMATION OF PAYLOAD BAY CONFIGURATION MORE: VIDEO:BRIEFING ON TANK'S PERFORMANCE VIDEO:TANK'S ONBOARD CAMERA LIFTOFF TO SEPARATION VIDEO:FLIGHT DIRECTOR EXPLAINS INSPECTIONS VIDEO:SUNDAY'S MISSION STATUS BRIEFING VIDEO:LAUNCH OF ATLANTIS! VIDEO:SHEDDING FOAM MAY HAVE HIT ATLANTIS VIDEO:ONBOARD VIEW OF EXTERNAL TANK SEPARATION VIDEO:INSIDE MISSION CONTROL DURING LAUNCH VIDEO:STATION CREW TOLD VISITORS EN ROUTE VIDEO:HOUSTON RADIOS DEBRIS REPORT TO CREW VIDEO:POST-LAUNCH NEWS CONFERENCE VIDEO:QUICK-LOOK BRIEFING ON DEBRIS LAUNCH REPLAYS:VIDEO:BEACH MOUND TRACKER VIDEO:CAMERA IN FRONT OF PAD VIDEO:BANANA CREEK VIEWING SITE VIDEO:VEHICLE ASSEMBLY BUILDING ROOF VIDEO:PAD 39B SIDE PERIMETER VIDEO:PLAYALINDA BEACH TRACKER VIDEO:PLAYALINDA BEACH ZOOM VIDEO:UCS 23 TRACKER VIDEO:UCS 11 TRACKER VIDEO:MISSION SPECIALIST 4 STEVE MACLEAN BOARDS ATLANTIS VIDEO:MISSION SPECIALIST 3 HEIDE PIPER BOARDS VIDEO:MISSION SPECIALIST 2 DAN BURBANK BOARDS VIDEO:MISSION SPECIALIST 1 JOE TANNER BOARDS VIDEO:PILOT CHRIS FERGUSON BOARDS VIDEO:COMMANDER BRENT JETT BOARDS VIDEO:ASTRONAUTS EMERGE FROM CREW QUARTERS VIDEO:CREW SUITS UP FOR LAUNCH TO SPACE VIDEO:FINAL INSPECTION TEAM CHECKS ATLANTIS VIDEO:ASTRONAUTS READY FOR SECOND LAUNCH TRY MORE: STS-115 patchThe official crew patch for the STS-115 mission of space shuttle Atlantis to resume orbital construction of the International Space Station.Choose your store: - - - John Glenn Mission PatchFree shipping to U.S. addresses!The historic first orbital flight by an American is marked by this commemorative patch for John Glenn and Friendship 7.Final Shuttle Mission PatchFree shipping to U.S. addresses!The crew emblem for the final space shuttle mission is available in our store. 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