Live Public Affairs Office (PAO) Event from ISS: Following today’s swearing-in of NASA Administrator Bridenstine, the US crew spoke with US Vice President Pence and Bridenstine about their experiences on the ISS and their time at NASA. Bridenstine was confirmed by the U.S. Senate on Thursday, April 19, to serve as the agency’s 13th administrator. Prior to this position, he served in the U.S. House of Representatives for the state of Oklahoma, where he held positions on the House Armed Services Committee and the Science, Space and Technology Committee. Bridenstine also is a pilot in the U.S. Navy Reserve and the former executive director of the Tulsa Air and Space Museum and Planetarium.

Multi-Use Variable-G Platform (MVP): The crew inserted food cylinders in the food chambers in each Drosophila module in the MVP today. They collected solid and liquid samples, fixated them and inserted them into a Minus Eighty Degree Celsius Laboratory Freezer for ISS (MELFI). MVP is used to conduct research in space with a wide variety of sample types, such as fruit flies, flatworms, plants, fish, cells, protein crystals and many others. It includes 2 internal carousels that simultaneously can produce up to 2 g of artificial gravity. Each carousel hosts 6 separate removable experiment modules on each carousel. Video and still imagery, including microscopy, can be included. The platform provides temperature and humidity controls and monitors and records oxygen and carbon dioxide levels.

Mouse Stress Defense: The crew replaced waste collecting equipment and odor filters in the Mouse Habitat Cage Units today. Microgravity provokes cellular mechanical stresses and perturbs cellular signaling, leading to reduction of muscle and bone density. To overcome these stresses, one of the promising strategies is to activate Nrf2, a master regulator of antioxidant pathway. Mouse Stress Defense investigates how Nrf2 contributes to effective prevention of space-originated stresses.

Water Processor Assembly (WPA) Maintenance: There has been an increased ionic breakthrough on both WPA Multi-Filtration (MF) beds identified by a steep increase in the conductivity of the bed’s effluent. The beds were previously sampled to determine the species that is saturating the bed. Those samples, however, were inconclusive and it is believed the bicarbonate converted to carbon dioxide (CO2) and permeated through the sample bags. Today the crew collected new samples of the effluent from MF Beds 1 and 2 using ITCS sample bags that will not allow for CO2 permeation. These samples will be returned for analysis. The crew also replaced the WPA Separator Filter located on the Mostly Liquid Separator (MLS) and replaced a Waste Water Filter.

Remote Power Controller Module (RPCM) Remove and Replace (R&R): The N21B4B_B Remote Power Controller (RPC) 16 tripped on April 12, 2017 removing power from the Node 2 Moderate Temperature Loop (MTL) System Flow Control Assembly (SFCA) valve. Today, the crew, with ground team support, performed a power down, R&R, and successful checkout of RPC 16 and the Node 2 MTL SFCA.

Dragon Cargo Status: Over the weekend, the crew performed 6 hours of cargo ops, completing message #3. ISO estimates 14h 30m of cargo operations remain to complete Dragon loading prior to vehicle unberths on May 2.

Camcorder Deploy: Today the crew unpacked, configured and deployed five new camcorders that were delivered on SpaceX-14. These new camcorders will replace old camcorders that were stowed in a trash location for later disposal.

Today’s Planned Activities

All activities are complete unless otherwise noted.



Regeneration of Micropurification Unit (БМП) Ф1 Absorption Cartridge (begin)

Powerdown Deck Crew Quarters Laptop

FAZOPEREKHOD. Experiment Setup and Start ops.

NOD2O4 Closeout Panel Audit

PILOT-T. Preparation for the experiment

Environmental Health System (EHS) Rad Detector Power Off

Columbus Equipment power off

СОЖ maintenance

PILOT-T. Experiment Ops and Data Downlink

Mouse Stress Defense Item Gathering

Mouse Stress Defense Ice Brick Stowing

PILOT-T. Experiment Ops

Cleaning of gas-liquid heat exchangers 1,2,3 (ГЖТ) screens in FGB

XF305 Camcorder Setup

Mouse Stress Defense Cage Maintenance for Micro-G 3

Total Organic Carbon Analyzer (TOCA) Water Recovery System (WRS) Sample Analysis

PILOT-T. Closeout Ops

PHASE CHANGE Closeout Ops

Photo/TV Camcorder Setup Verification

PHASE CHANGE Experiment Setup and Start ops

MOTOCARD. Experiment ops, session 1

SSC HP Printer Checkout

MOTOCARD. Experiment Assistance. Video of the locomotor test

Crew Medical Officer (CMO) On Board Training (OBT)

MOTOCARD. End of Video-recording And Closeout Ops Tagup with specialists

Mouse Stress Defense Cage Maintenance for 1G 3

PHASE CHANGE Closeout Ops

Total Organic Carbon Analyzer (TOCA) Sample Data Record

Water Processor Assembly (WPA) Waste Water Filter R&R

Remote-Power-Controller-Module (RPCM) N21B4B_B Removal and Replacement

Vacuum cleaning ventilation grille on FGB interior panels (201, 301, 401)

URAGAN. HA “Video-spectral System” Solid-State Accumulator’s Contacts Cleanup and Test Shooting

Water Process Assembly (WPA) Multifiltration Bed (MF Bed) Efflent Samples

NOD2O4 Closeout Panel Audit

Photo/TV XF305 Camcorder Deploy and Trash

PCS Battery Swap

Camcorder setup to capture БД-2 exercise

Station Support Computer 9 Relocate to NOD3

Emergency Operations (EMER) Chip Measurement System (CMS) Battery Changeout

Regen Urine Processing Assembly (UPA) 6.3 Gather

Testing БД-2 Treadmill (Exercise 3)

Health Maintenance System (HMS) Profile of Mood States (POMS) Questionnaire

Public Affairs Office (PAO) Social Media Event

In Flight Maintenance (IFM) Separator Filter Removal and Replace (R&R)

Removal of Video Equipment Used to Capture БД-2 Exercise and Downlink the file

Portable CO2 Monitor Calibration

Exercise Data Downlink via OCA

Multi-use Variable-g Platform MWA Preparation

Water Processor Assembly (WPA) Waste Water Filter R&R Kabin Replacement

IVA Toolbox Drawer 2 Tool Labeling and Socket Peg R&Rs

Multi-Use Variable-G Platform Sample MELFI Insertion

Multi-use Variable-g Platform Sample Fixative

GEMATOKRIT. Equipment setup

Public Affairs Office (PAO) High Definition (HD) Config LAB Setup

PAO Preparation

Public Affairs Office (PAO) Event in High Definition (HD) – Lab

Regeneration of БМП Ф1 Absorption Cartridge (term)

Columbus GFI Test – Inverter reconfiguration

Columbus Equipment power up

Environmental Health System (EHS) Rad Detector Power On

Completed Task List Activities

JAXA Report Part 6

Columbus Photo Documentation [completed Saturday]

ARED Upper Stop Cable Remove and Replace [completed Sunday]

Recorded Greeting Request Rice Space Day [completed Sunday]

Recorded Greeting Request Space Center Houston [completed Sunday]

Ground Activities

All activities are complete unless otherwise noted.



RPCM N21B4B_B R&R Powerdown and Recovery

Three-Day Look Ahead:

Tuesday, 04/24 : Pretreat Tank R&R, PCG, JSL Firewall, OGS O2 FSE Removal, HRF BRIC T/S, UPA S/W 6.3 Setup, Dragon Cargo Ops, Educational Imagery Recording, Circadian Rhythms

Wednesday, 04/25 : Veggie Ponds Exp, Dragon Cargo Ops, ETVCG Teardown, Mouse Stress Defense

Thursday, 04/26: Node 3 LTL PPA R&R, EVA Preps (Tether/RET Inspect, EMU Swap, EMU Water Dump), Locker Reconfig, Dragon Cargo Ops, Dragon LiOH install, Meteor Hard Drive Swapout, Mouse Stress Defense, Circadian Rhythms.

QUICK ISS Status – Environmental Control Group: