(Corey, Jim)

BSCISI#3

The Keel Assy was installed on the assembly completing the superstructure for the ISI.

Machining QA note: 

One of the Upper/Outer Walls D0901533 had a tapping issue, where the tapered tap was used on the wrong side.  This makes installing a screw hard/tight.  We used our screws as taps, and this opened up the threads enough for the screw (this was only seen on one Wall).  This tapping issue was also observed on parts for our Small Actuators.

Horizontal GS13 Installation

Test GS13s were installed on the assembly ("test" meaning these are GS13's which ARE NOT to be installed in the LIGO vacuum system).  The locations & serial numbers for the GS13's are as follows:

• corner 1:  s/n  14
• corner 2:  s/n  27
• corner 3:  s/n  37

Machined Arrows Finally Match Up!

On Stage0 & the Stage2 Optics Table, arrows were etched into each plate so one can orient them such that the vent lines on the Optics Table will be parralel with the Support Tubes.  For the first two assemblies, aligning these arrows had the lines angled in the wrong direction.  Assembly#3 is the first to have the arrows match correctly.  (See attached photo...which needs to be rotated clockwise 90deg)