[This is work from Friday]

(Chris, Corey, Eric, Jeff, Joe, Jim, Mitch, Natalie)

Assy #2

Installed Trilliums

We don't have the called out 1/4"-20 x 3" bolts (they were used for Vertical GS13s on #1---because procedure erroneously called out 1/4-28 bolts...so the Trillium bolts for Assy#2 were used instead), but went ahead and installed/positioned these seismometers.  We had (1) 3" bolt and I used this to atleast check that it would thread into a couple of the holes for each Trillium (more 3" bolts are currently in a bake load).  We have 2.5" long bolts and may use them instead.  Here are where the Trilliums were installed:

Corner 1:  s/n 001

Corner 2:  s/n 24

Corner 3:  s/n 15

L4C Swap

Installed new & freshly leak tested pod.  Note:  These pods had noticeable Aluminum oxide particles/marks on them, and required a few wipes to remove the loose particles (but we couldn't get rid of all aluminum oxide marks). 

Corner 2:  Vertical L4C s/n 127  (replaced s/n X-45)

Don't have torque values for 10-24 generic bolt in our procedure so I went with a value of 22.8 inch-lbs obtained from engineersedge.com (these are bolts which are used to secure the Vert L4C down.

Installation of Remaining Capacitive Position Sensors (CPS)

Due to issues with soldering flux for some of our Class-A CPS's, we were short Class-A CPS's.  We are going to use some TEMPORARY Class-B CPS's instead (these are only to be used for testing, and must be removed before the system is installed in a BSC Chamber).

Flexure Serial Numbers

While we're at it, thought I'd also post the s/n's for the Flexures.  Note---these are the second set of Flexures installed on this assembly.  We installed a second set in the hopes of remedying the "twist" in the system we observed (it didn't help).  Here are the Flexures & their locations:

Corner1  
0-1:  s/n 142
1-2:  s/n 127
Corner2  
0-1:  s/n 144
1-2:  s/n 128
Corner3  
0-1:  s/n 133
1-2:  s/n 138

Assy#3

Plates removed from oven & some taken to Staging for helicoiling.