Today we swapped the PT154 gauge on the FC-A section that was reported faulty in alog 81078 with a brand new gauge, same make/model.

FCV1 & 2 were closed to isolate the FCA section, and the angle valve on the A2 cross closed to isolate the gauge. Volume was vented with dry nitrogen and gauges swapped. CF connection was helium leak checked, no He signal above the HLD background ~2e-10 Torr-l/s.

Closing WP 12200