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um so with that we can go ahead and

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start talking about the details of the

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space walks so if we can show the first

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graphic

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so there are space walking crew members

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we have rick mastracchio he comes to us

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with six space walks under his belt so

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he's a very experienced spacewalker he

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will serve the ev1 or lead spacewalk

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officer or lead spacewalker role for

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eva's one and two

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and on the right side you see mike

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hopkins he is a rookie spacewalker but

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very excited to go out the door he will

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be the ev2 for eva's 1 and 2 and then

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he'll take the lead ev1 roll on eva 3.

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on the inside we'll have koichi wakata

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who is flying the ssr ms or the space

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station robotic arm he will be as you'll

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see in the video one of the crew members

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spends a large majority of all three of

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the evas on the arm so koichi will be

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tied into this and he'll be flying the

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arm

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so the next graphic

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shows the overviews of the three space

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walks so broad strokes what we plan on

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doing on the first the first spacewalk

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is focused on de-integrating the failed

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pump module so that that includes

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demating the fluid quick disconnects

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installing a pump module jumper box

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which allows us to have fluid flow

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between the rest of the tcs the thermal

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control system with the accumulators in

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the system

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and then demating the electrical

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connectors on that failed pump module

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and then we also spend a little bit of

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time working on the spare pump module

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which includes releasing some

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multi-layer insulation on the second eva

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we're focused on removing the failed

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pump module from the truss and then

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temporarily stowing it on the poa or the

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payload oru accommodation tempstow

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location and then we work at the end of

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the eva on releasing the spare pump

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module

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from the esp3 carrier on the outboard

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side of s3

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and then we fly that over to the s1

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location and install that into the trust

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and we plan on hooking up only the bolts

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and the electrical connectors on this

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eva and then on the third and final eva

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we will complete that spare pump module

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installation which includes mating the

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the four fluid lines and then relocating

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the failed pump module from its tempsto

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location out to the esp the esp3

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location where the failed came from

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so with that we can go ahead and get

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started with the videos and we'll talk

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through the tasks so on the first

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spacewalk the crew members egress the

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joint airlock and they make their way up

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to the center of the s1 truss

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mike hopkins mike will be the free float

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crew member rick will ingress the arm

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koichi will fly him up to the work site

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and then the two crew members will spend

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some time demating those four

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fluid quick disconnects which are

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illuminated there

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so a quick overview of the interfaces on

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the pump module you have four fluid

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quick disconnects three of them are one

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and a half inch size one is a quarter

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size you have five electrical connectors

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and then you also have four fasteners

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which are 5 8 inch fasteners which are

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what the primary fasteners that hold the

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pump module into the truss so here we

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are fortunate enough on the partial

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gravity simulator to have doug wheelock

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and tracy caldwell dyson help us create

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a training video about lessons they

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learned during the last pump module r r

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so we were able to film this training

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video just a few days ago and we got

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that uplink to the crew so they're able

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to learn of any gotchas

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once those four fluid lines are

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disconnected they'll then work to

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install the half inch and the one and a

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half inch fluid lines to this pump

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module jumper box as i mentioned this is

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what allows ammonia to flow another the

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pump module is out allows ammonia to

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have access to the

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accumulators and the nitrogen and

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ammonia tanks to prevent liquid lock

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so that's what we spend most of eva 1

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doing

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on eva 2 the focus is getting the failed

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pump module out of the trust and the new

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one in the trust so there you can see

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the loop a pump module on the s1 truss

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on the right side and as mike mentioned

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we have three spares we're shooting for

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the esp3 spare pump module to install in

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its new home

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right outside the air lock mike will

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pick up the adjustable grapple bar from

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the esp-2 carrier

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he will then translate up to the truss

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and rick will be on the arm and they'll

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work to release the four fasteners that

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are holding the pump module on the truss

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then they'll slowly slide the pump

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module out of the truss about halfway

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giving them access to the install

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location for the adjustable grapple bar

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and it's this grapple bar that allows

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the pump module to be temporarily stowed

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between evas

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so once the pump module is free of the

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trust they'll give koichi the go to

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relocate the arm

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and rick over to the poa or the

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temporary stow location

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for this pump module mike said this is

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our desire is to keep this pump module

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as a viable spare so that we can perform

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additional maintenance on it in the

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future

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so once they have the spare pump module

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stowed on the poa

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they'll then work to translate over to

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esp3 where the new pump module is

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located

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they'll release that from the carrier

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and then fly back over to the truss to

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install that new pump module in the same

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location where we removed the failed

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as you can see there's quite a bit of

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arm maneuvers throughout all of these

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evas so i'm sure koichi will be getting

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so they'll work together to slowly guide

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the pump module into the truss

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and then they'll attach the four

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fasteners that hold it in place and then

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mate the electrical connectors which

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will give us good insight into seeing if

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we have a viable spare in this pump

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so the third space walk is focused on

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getting the fluid lines hooked up to the

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pump module those four fluid lines

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hooked up to the pump module and then

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working on relocating the failed pump

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module from its temporary stowage

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location

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retrieved the spare

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on eva 3 we'll be swapping rolls so mike

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will actually be the crew member in the

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arm this time and rick will be the free

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float crew member as koichi is flying

169
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mike over with the failed pump module

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rick will spend some time at the s1 pump

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module install location verifying that

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00:05:45,670 --> 00:05:44,240
he has

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00:05:49,029 --> 00:05:45,680
everything buttoned up and that we've

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00:05:52,070 --> 00:05:49,039
cleared the mt translation corridor

175
00:05:54,390 --> 00:05:52,080
once they're at the esp3 worksite

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mike will slowly

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00:05:58,309 --> 00:05:56,479
give commands to koichi to bring him

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into the work site

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then they will the two crew members will

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00:06:02,870 --> 00:06:01,520
work together to release the adjustable

181
00:06:04,550 --> 00:06:02,880
grapple bar

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00:06:07,189 --> 00:06:04,560
and then they will work on rotating the

183
00:06:09,510 --> 00:06:07,199
pump module 180 degrees to allow them to

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00:06:11,990 --> 00:06:09,520
install it into the rails

185
00:06:13,510 --> 00:06:12,000
on the esp3 worksite once they install

186
00:06:15,189 --> 00:06:13,520
it they'll attach the four fasteners

187
00:06:16,950 --> 00:06:15,199
that hold it in place make some

188
00:06:18,870 --> 00:06:16,960
electrical connectors to provide heater

189
00:06:20,950 --> 00:06:18,880
power to this failed unit and then

190
00:06:22,629 --> 00:06:20,960
install some multi-layer insulation over

191
00:06:24,230 --> 00:06:22,639
it to protect it

192
00:06:26,150 --> 00:06:24,240
michael then worked to retrieve the

193
00:06:28,309 --> 00:06:26,160
adjustable grapple bar from a temp stow

194
00:06:30,469 --> 00:06:28,319
location

195
00:06:33,430 --> 00:06:30,479
and koichi will then begin maneuvering

196
00:06:35,590 --> 00:06:33,440
him from the outboard location on s3 all

197
00:06:36,950 --> 00:06:35,600
the way back to the esp-2 carrier on the

198
00:06:38,469 --> 00:06:36,960
airlock

199
00:06:40,710 --> 00:06:38,479
during this time rick will be cleaning

200
00:06:42,150 --> 00:06:40,720
up the work site which includes

201
00:06:43,510 --> 00:06:42,160
packing up the tool bags that they

202
00:06:45,670 --> 00:06:43,520
brought out with them and then heading

203
00:06:47,110 --> 00:06:45,680
back towards the airlock once at the

204
00:06:48,950 --> 00:06:47,120
esp-2

205
00:06:50,710 --> 00:06:48,960
location

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00:06:52,710 --> 00:06:50,720
mike will install the adjustable grapple

207
00:06:54,390 --> 00:06:52,720
bar onto the fhrc or the flex hose

208
00:06:56,629 --> 00:06:54,400
rotary coupler which is its temp stow

209
00:06:58,230 --> 00:06:56,639
location once complete with that he will

210
00:07:00,230 --> 00:06:58,240
work on egressing the arm and removing

211
00:07:01,670 --> 00:07:00,240
the foot restraint and then the two crew