US EVA-46

The third EVA from Expedition 53 took place on Oct 20, 2017.
Crewmembers Randy Bresnik-EV1 (red stripes) and Joe Acaba-EV2 (no stripes) spent 6 hours and 49 minutes working outside the station to complete this third EVA.
The original plan for this EVA was to put a High Definition Camera on the starboard side of the truss, to continue lubricating the Canadarm2, replacing a faulty camera on Destiny Lab module and to prepare external spares for future robotic handling.

The plan for this spacewalk had to be changed when the camera on the newly installed LEE-A was found to be out of focus. Therefore, the replacement of the LEE-A Camera & Light Assembly (CLA) was made the priority for this third EVA in favor over the Destiny camera.

In preparation for the EVA, the MBS-Canadarm2-Dextre was moved to the starboard side of the station. LEE-B was attached to PDGF #4 on the MBS (see photo).

EV1 first task was to switch out a broken fuse on the Enhanced Orbital Replacement Unit Temporary Platform (EOTP) of DEXTRE.

Joe Acaba-EV2 headed his way towards the S1 truss to setup a foot restraint in order to be installed on the LEE-A of Canadarm2.

Acaba was assisted by Bresnik to climb the foot restraint already installed on the LEE-A of Canadarm2.

Bresnik headed to the ESP-2 to remove a multilayer insulation blanket from a spare Main Bus Switching Unit (MBSU).

EV1 removing an MLI on the underside of ESP-2

Canadarm2 is now moved towards the S1 truss to start the next task in replacing a camera.

Acaba (EV2) replacing and installing the new External HD camera Assembly (EHDCA).

Bresnik removing another MLI blanket from another MBSU on ESP-2

After this task, Bresnik ventured out to the port side to the ELC-1 pallet to work on a spare ammonia Pump Module in order to remove the MLI blanket.

While on the port side of the truss, Bresnik installed a pair of T-handles on the Port Radiator Grapple Fixture Bar.

More views of the Port Radiator Grapple Fixture bar on P1. The T-handles will allow for future handling of ISS radiators if a replacement is required. The Grapple Fixture Bars were delivered aboard SpaceX CRS-2 Dragon spacecraft.

Egressing from the robotic arm, Acaba (EV2) attached the foot restraint to S1 to start the next task in replacing the degraded Camera and Light Assembly (CLA) on LEE-A.

Then Acaba proceeded to lubricate the LEE-A.

While Acaba was working on the LEE-A, Mission Controllers noted that the controller of his SAFER unit (Jetpack) had popped out of its slot. Bresnik was heading towards the Starboard Radiator Grapple Fixture but stopped and assisted Acaba with the SAFER unit.

Due to this situation, the T-handle installation on the Starboard Radiator Grapple Fixture Bar was canceled. Instead, Bresnik moved to ESP-2 to remove the MLI on the Pump Module.

After completing the main tasks and some get-aheads, the spacewalkers began closing out the EVA making tool inventory and reconfiguring safety tethers.

This concludes US EVA-46.

Source: Spaceflight101.com

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