Once they are out of the airlock and setup is complete, Lopez-Alegria and Herrington move to a point at the junction of S0 and P1 for a two-hour installation of fluid jumpers to move ammonia between the two. The two release two jumpers on S0, then move to the jumper install position.

Lopez-Alegria will mate and install SPDs on two jumper connections on the S0 side, while Herrington performs a similar task on the P1 side. Each connection will involve a three-minute leak check. Lopez-Alegria and Herrington reinstall the thermal booties and together they close their respective ends of the P1 and S0 utility tray shrouds. Then Herrington and Lopez-Alegria, the latter on the CETA cart, move on to P1s starboard keel pin.

NASA TV Schedule for Flight Day 6

Orbit  Item                              EST (GMT Minus 5)71     ENDEAVOUR CREW WAKE UP            08:20 AM       (begins FD 6)72     ISS CREW WAKE UP                  08:50 AM72     EVA #2 PREPARATIONS BEGIN         09:35 AM75     EVA #2 BEGINS                     02:20 PM79     EVA #2 ENDS                       08:50 PM80     MISSION STATUS BRIEFING           09:30 PM       (time subject to change)82     ISS/ENDEAVOUR CREW SLEEP BEGINS   12:20 AM

Endeavour mission specialist Michael Lopez-Alegria describes the second spacewalk:

"The first thing that we're going to do is connect the two trusses together, not electrically but this time hydraulically, I guess, is the word I would use; to connect the two sets of fluid lines. So, there are long, probably about 5-foot-long, fairly large diameter, somewhat flexible hoses with quick disconnects, like I described, on each end that allow the fluid to go across the border between the two trusses. This is going to be a challenging task because these things are very large and they're somewhat unruly, and they're pressurized and they want to stay in a certain orientation and we're going to have to bend them around a little bit. So, if we were electricians in the first EVA, we're like plumbers on the second EVA."

"We get them, they're going to be, they're actually up there right now, stowed outside on S0, and we have a certain choreography that we'll do to hand them to each other so we don't actually have to walk or translate with them, and we'll put one on each end, and get leak-checked with the ground helping us out, install the spool positioning device, and then we'll do the same thing on the second one.

"The next task is to relocate the two keel pins, which are basically upside-down "A"s with a little point on the end of it, and that point goes into the shuttle's cargo bay for launch. So that's what holds the whole truss in the cargo bay. The problem with that is that they're in the way of this little train track that runs down the front face, so we need to remove that. I didn't mention that on EVA 1 we'll have removed the drag links, which is sort of the third member of the tripod there, and stowed them. We do that using a Pistol Grip Tool, which is a very fancy cordless screwdriver; it looks like a gun. And we use that to tighten or loosen bolts. So we'll loosen two bolts on the drag links and put that in a stowage location, then we'll do basically the same thing with the keel itself."

"The interesting thing is that on the last, it's attached in two places to the truss; we'll remove one bolt and reinsert it for stowage, then John will enter a translation foot restraint, of which there are two on the CETA cart -- one of them pointing, so your heads are pointing in each direction -- John will get in the starboard one, I'll get in the port one, and we'll remove this keel and with me holding the keel and my feet restrained to this TFR, John will push the CETA cart, manually with his hands, to the stowage location. So instead of using the robot arm to do this translating we're trying to use the cart. We turn the keel around and put it inside the truss, where it won't interfere with the translation of the CETA or the Mobile Transporter. And basically we then repeat the same process with the second keel."

"But, between those two, we'll take the second WETA which is again the Wireless Video System antenna assembly, outside, attach it to its stanchion which mounts on the keel, flies up on the keel, take the whole assembly off the keel and then put it on the very outboard edge of P1 so that there will be coverage for the Wireless Video System out there. And the last task on EVA 2 is an interesting one. When we leave, the next element needs to be installed, of course, on the left, port end of P1 -- which is not P2, it's actually P3 -- but the way it's done is using the robot arm but the robot arm needs to translate aboard that MT along the train track to get to that end. And the cart is between the train track, between the MT and the end of the train track, so we actually will remove the cart, take it off, and put it on the other side of the MT."

"And the way we do that is that John will be in a foot restraint attached to the SSRMS, the space station robotic arm, I'll release the two, two of the four wheels clamps that hold it, the train to the track, and he will just pick it up. I think Ken Bowersox will be operating the arm at that point, he'll back him away and then maneuver him in a big arc-he's going to have a great view -- to the exact opposite side; same thing but opposite side, of the other CETA cart. And I will translate over manually, and I'll reattach the two wheels, and we'll just leave it there and couple it. So that this whole, now we're going to have the MT, the CETA cart 1, which flew up on S1, CETA cart 2, which flew up on P1, all together, and then they'll move that whole contraption down to install the P3 on mission 12A."

Endeavour mission specialist John Herrington talks about the second spacewalk:

"EVA 2 begins pretty much the same way EVA 1 began. Mike is the first one out of the airlock, I'm second. I have to pass out a bunch of equipment that we'll install during that EVA. I'm second, I get out, I gather up my stuff; Mike has already headed out down to P1. I follow him making sure our tethers don't get, we keep our tethers in the proper spot. Once again, we have to swap over to another tether; what's different on this one is that now we have the CETA cart has been released and we can move it back and forth. We will install onto the rail truss segment a little thing called a tether shuttle, and what that allows us to do is it clamps over the rail and I can hook my safety tether to that now, and that can follow me down the rail. So it allows us to go even farther down the truss segment."

"On the EVA 2, now that the CETA cart moves back and forth we're going to utilize it to help remove some of the launch structure that was on P1 for launch. We actually, I have to help Mike remove what we call keel pins, they're large keel pins that actually mount to the bottom of the payload bay for the truss. Now we have to take them off because they're in our way. We have to move those so the CETA cart can move down the rail as well as the MBS, or the robotic arm mobile base structure, can move down and actually help in later installation. So Mike and I, we choreographed this, I will do certain things, he will actually grab hold of the keel pin, I'll climb into the CETA cart, and I'll move it down the rail by hand. So I get, it's not electrical or anything, it's just a, I liken it to a railcar going down. So I'll move it down."

"Mike will install the keel pins. We'll do both of those; we'll also install another wireless video antenna on P1 at the very far left side of P1, so we can capture video in that area. So we'll choreograph that again, another big camera stanchion, and I install the antenna onto that, or, yeah, Mike will pass it to me and I'll install the camera on that and the antenna. And then, we will put that on P1. After we've done that we head back down and we move the CETA cart again, but the neat thing is I get to move the CETA cart using the robotic arm from the left side of the station all the way over to the right side of the station."

"So, my job will be to climb onto the space station robotic arm, grab hold of the CETA cart, and make sure I'm tethered to it, and then Mike will release two little, we call them wheel bogies that release it off of the rail. I pick this CETA cart up, and then the robotic operations are, will be to pull me back off the front of P1 and actually maneuver me all the way around back over to the right side of the station where I install the CETA cart on the rail. That allows the robotic arm on the mobile base, the MBS, to go all the way down to the end of P1, so it just kind of gets it out of the way. But, it's going to be a great ride: I'm going to get to hang out and watch the world go by."