This morning, before proceeding with the alignment of the WI Point Absorber Actuator (PAM) on the HR surface of the mirror, Ettore inspected the large ZnSe viewport (158 mm diameter).

Unfortunately, the viewport shows the same coating degradation already observed on the NI side (69077). 

The inspection of the small viewport will be carried out after the payload removal.

 Replacing the viewport will require the removal of the WI PAM actuator.

Nevertheless, we proceeded with the actuator alignment as planned (see dedicated entry). Before the viewport replacement, the actuator position will be recorded with respect to the alignment plate, so that it can be reinstalled in the same position afterwards.