We installed the compression rings on both A and B ends of the Mode Cleaner Tube (MC2) between HAM4 and HAM5. We completed assembly of all four of the Viewport Frame sections (2 per baffle). We attempted to attach the frames to the compression ring brackets and had difficulty. Screws were meeting resistance at three locations, one per frame. To prevent galling and particulate generation, we removed three of the four frames from the tube. One frame was successfully installed at MC2 A. The plan is to evaluate the #10-32 screws and tapped holes tomorrow morning.

Lisa C. Austin, Thomas Vo, Nichole Washington and Scott (of Apollo).