The US Spacewalk 89 will be conducted by Loral O'Hara
as EV1, with the Red Stripes and Andreas Mogensen as EV2.
EV1 will egress the airlock, install the microorganisms, caddy on their swing arm.
EV2 will retrieve a medium sized bag
with a high definition camera in it.
After a quick buddy check, EV2 will translate up the truss
to the port side to set up for their next task.
They will drop their safety tether
as well at this location.
Meanwhile, EV1 will begin the micro organism sampling
by first getting a control sample in free space.
Then they will flip the microorganisms caddy
to get to the sample site, open the thermal cover, and then take a sample
of the vestibule area with the first sample from the Caddy.
They will then take a sample
of the thermal cover itself.
When complete, they will close the thermal cover
and get another sample on the aft side of the airlock
between two handrails.
Once complete,
EV1 will translate to the aft nadir portion of the lab
to get a sample of the carbon dioxide removal assembly vent.
This will be the first of three vent sample
locations on the lab.
EV1 will then
translate ISS forword on the lab to the port side
to get a sample from the oxygen generation
assembly vent.
The last vent
location is on the port meter aft section of the lab
to get a sample of the vacuum exhaust system.
EV1 will remove the multilayer insulation
to get sample on this vent and then return the insulation.
When complete with all of these vents, EV1 will translate
back to the airlock.
Meanwhile, EV2
will translate to the port lower outboard camera
to relocate an Ethernet cable to the base of the stantion and to prestage
some tethers.
EV2 will then retrieve a articulating portable foot
restraint to install on the robotic arm.
Once installed on the robotic arm,
EV2 will ingress to foot restraint and retrieve the bag with the new camera.
Then the robotic arm will fly EV2 over to the camera location
for the removal and replace of the new high definition camera,
EV2 will install a handling aid on the old high definition camera,
release a cable restraint and demate two power cables.
They will partially release the old camera
using the cam lever and install a lens cover,
then fully release
Intense told the old camera on the outside of the bag.
Next EV2 installs the new camera removes the lens cover
and stows the old camera
inside the bag to stop it.
Then they will remate the power cables
into the new high definition camera with wireless access.
The rest of this task will be dedicated to properly
routing 2 power cable and wireless access port cable
to allow full pan tilt capability for the camera group.
This includes installing a clamp
and a strap to restrain the cables.
Lastly, EV2 maneuver to the base of the camera stanchion
to mate the high definition wireless access port cable
to the Ethernet cable previously relocated.
While EV2 works on the camera replacement,
EV1 will stow microorganisms caddy
in the airlock and retrieve a DC to
DC converter unit jumper cable bag
and translate to the P4 P5 interface.
EV1 will need to drop a green tether to reach their safety tether.
Once at the worksite EV1 will install the jumper cable
between two DC to DC converter units that will create
additional fault tolerance in the event of an integrated equipment assembly.
DC to DC converter unit where to fail.
The old cables
will be stowed on a dummy panel
When complete
EV1 will check with EV2 to see if they need any help
with the camera replacement and then move back to the airlock.
EV1 will swap
bags to get the alpha magnetic spectrometer or AMS bag
and then translate starboard to the AMS worksite.
They will stow the bag
on the AMS handrail
and then work to relocate a cable that is in the way
of the ingress location on the truss.
EV2 will be flying on the robotic arm back to the egress position
They will egress and clean up the robotic arm,
including stowing the portable foot restraint
and translating back to the airlock after they retrieve their bag.
They will stow the old high definition camera and then translate out
to the Alpha magnetic Spectrometer worksite with EV1.
Once at
the worksite, EV2 will guide EV1 into the truss
near the patch panel, avoiding areas that could damage the hardware.
They will work together to remove beta cloth
by cutting the lacing cord.
EV1 will test the connector demate simulator
tool on the exposed connectors to assess
access.
Then the two crew will carefully swap positions
to allow any two to access access with the tool at the Patch panel location.
Again, being careful not to touch
any harmful areas
When in complete, they will take close out
photos of the patch panel and re secure the beta cloth.
Then EV2 will egress the truss element
and EV1 will retrieve two crew life bag and both crew members
will translate back to the airlock
and that will successfully conclude U.S.
Spacewalk 89.