U.S. Spacewalk 81 will be conducted
by EV1, Josh Cassada, and EV2, Frank Rubio.
EV1 exits the airlock and gets handed
one of the bags in preparation for the EVA
and the second bag,
the strut bag, gets handed out and put on everyone's body restraint tethe
EV2 egress is the airlock and that allows EV1
to start translation up the CETA spur over
one of the ISS truss.
Josh translates along and stops at a handrail to hook up
EV2’s safety tether and his safety tether
and continues his translation path.
As he makes his way down the truss,
he translates along and gets out to the end of the S6 truss
and tethers the strut bag.
Meanwhile, Frank Rubio closes the thermal and makes his way up the CETA spur
to face one to follow the same translation that Josh just translated along.
He makes his way out
to the S4 truss and stows the cable bag
and retrieves a pair of cables
for the 3A Beta Gimbal Assembly.
This is in preparation for the ISS Rollout Solar Array
that will be installed in a future EVA.
He hooks them up on the mounting bracket,
routes one on the right side and tethers it off,
and then routes the one on the left side.
Frank translates out with that cable bag
and temporarily stows it on the S6 truss.
Meanwhile, Josh climbs
up onto the one Bravo BGA
and drives the H fixture bolts.
This is in preparation for installing the Mod Kit Assembly.
When Josh is finished at the Beta Gimbal Assembly.
He leaves and joins Frank on the truss and starts assembling the upper triangle.
They take the pieces out of the strut bag
and bolt them together into a triangular pattern.
Once these pieces are put together,
Josh will ingress the Articulating Portable Foot Restraint
in preparation for attaching the upper triangle
to the Beta Gimbal Assembly.
Frank hands the triangle up to Josh
and Josh installs it with his Pistol Grip
Once this is in place,
Josh will egress the foot restraint and help Frank retrieve
several of the other struts as part of the assembly.
Frank will get into position and hand
one end of the lower strut up to Josh and get into position
to drive his bolt.
Working together, the two crew members will install the lower strut
and bolt it in place.
Frank will apply the final torque on the bolt
and get into position for the mid strut
Again, working together, the two crew memb will install the mid strut
and drive the bolts to put it in place.
Once this is complete, the two crew members
retrieve the struts for the right side of the mod kit.
They will repeat the process by installing the lower strut first
and driving the bolts to tork it into place.
The two crew members will follow that up
with the right side mid-strut
working together to get it into place and driving all the bolts.
Meanwhile, Josh will egress the foot restraint
and retrieve the ISS Roll Out Solar Arrays that will get put in place
in preparation for deployment of the ISS Roll Out Solar Arrays
when that arrives.
This is very similar to what Frank did earlier in the EVA,
where he'll take one of the two cables and route it over to the right side
and tether it in place.
And then he'll do the same to deploy the cable on the left side.
Once this is done, the crew members will start collecting their gear
and stowing it in the empty bags to bring back to the airlock.
Frank collects these bags and puts them on his body restraint tether
He makes his way back to the airlock and stows them inside.
Josh retrieves the Articulating Portable Foot Restraint,
puts it on his body restraint tether and takes it back to the Crew Aides and Tools Translation Aid,
stows it,
and then makes his way back to the airlock to complete the EVA.
Frank ingresses the airlock first, followed by Josh.
The crew will close the thermal cover
and then close the hatch on the inside.