NHC was entered on April 17, 2023 for inspection and maintenance. Summary :

Compressible and non-compressible waste was loaded into a 55 gal drum and removed from the NHC. This same drum will be inserted into the SHC at a later date to be sorted, compressible waste compressed, and drum filled more.

Manipulator remote end tong cables checked. Tong cables didn't show any wear but both east and west had tong cables had hopped off the third highest pulley (see detailed write up . This was fixed by tying the tongs in the closed position to provide slack in the cables then inserting a t-handle through the wrist and offering the cables back onto the pulleys. Cable hopping is most likely due to aggressive ratcheting and releasing of the tong during operation.

Manipulator booting flanges were removed from both manipulators as it was previously found that  the booting interferes with access to the inside of the containment box so it could not be used. Flanges were remove to provide even more clearance.

Containment box cover removal arm - linkage fasteners were removed one at a time and blue locktite added then reassembled and tightened appropriately to allow arm to swing freely (see detailed write up) . Lack of locktite during initial assembly was allowing fasteners that pass through bushings into the linkage arms to loosen over time/cycling.

Exhaust pre-filter changed.

Target insertion jig - The target insertion jig was rumored to had a missing fastener. A loose nut was found that appeared to belong to it but after much inspection a location for it could not be found...i.e. all parts appeared to be counted for. During this inspection it was noted that some over the fasteners in the main hinge were loose. Again these were removed one at a time, blue locktite added and fasteners tightened to allow proper movement (see detailed write up).

Window inspected for leak. No sign of any leakage from the "hot" side.