David Wang and I accessed the NHC today to check if the proposed duct routing (IRH1618) will interfere with servicing or replacement of the TCS turbo pump.  A piece of plywood was placed in the future position of the NHC/TCS partition wall (IRH1609), and a ducting elbow was placed at the approximate position of the nearest elbow to the turbo pump.

David concluded that the ducting in the proposed location will not have any significant effect on replacement of the turbo pump, and he does not expect replacement will be difficult to perform after installation of the wall and NHC ducting.  Standing at floor level towards the east side of the TCS space and reaching upwards seemed to be the best way to reach the turbo pump flange bolts.  It was also noted that there was sufficient room in the TCS space for two workers to be in the area.