ISS Daily Summary Report – 5/05/2021


AC Touch: Per standard procedure, the crew touched both the coated and uncoated coupons for this long-term investigation. Boeing Environment Responding Antimicrobial Coatings tests is an antimicrobial coating on several different materials that represent high-touch surfaces. Some microbes change characteristics in microgravity, which could create new risks to crew health and spacecraft systems, as well as create the possibility of contaminating other planetary bodies. The samples remain in space for approximately six months and then will return to Earth for analysis.

Celestial Immunity: Today’s goal was to perform the first sampling activities for the cell cultures in a 24-well culture plate.  However, it was discovered that the fluids in the wells had spilled outside their designated well volumes, which mixed and invalidated the science capture. The team is discussing a forward plan and impacts. This project seeks to gain a broad understanding of how gravity affects overall human immune function and potentially uncover novel pathways of immune function that can be exploited to develop better vaccines and immunobiologics for human use. The project will build on earlier studies that evaluated lymphocyte (a type of white blood cell) function in microgravity. The project will also evaluate whether gravity-regulated immune pathways are affected by age, by examining cells from both young adult and elderly donors in parallel.

ManD:  As the next step in the troubleshooting of the Manufacturing Device (ManD), the crew exchanged the feedstock canister with another canister and manually fed the feedstock filament into the extruder area.  The Manufacturing Device enables the production of components on the ISS for both NASA and commercial objectives. Parts, entire experiments, and tools can be created on demand utilizing the ManD printer that is installed into an Express Rack locker location. ManD is capable of producing parts out of a wide variety of thermopolymer feedstock, including engineered plastics.

SUBSA (Solidification Using a Baffle in Sealed Ampoules): The crew installed the SUBSA experiment hardware into the Microgravity Science Glovebox.  The first SUBSA investigation to be performed will be the BRAINS investigation.  BRazing of Aluminum alloys IN Space (SUBSA-BRAINS) examines differences in capillary flow, interface reactions, and bubble formation during solidification of brazing alloys in microgravity. Brazing technology bonds similar materials (such as an aluminum alloy to aluminum) or dissimilar ones (such as aluminum alloy to ceramics) at temperatures above 450°C. It is a potential tool for construction of human space habitats and manufactured systems as well as a repair tool for damage from micrometeoroids or space debris.


Port Crew Quarters (CQ) Single Fan Failure Troubleshooting – Crew performed additional troubleshooting designed to isolate the cause of the Port CQ Single Fan Failure Caution that has been in alarm since Saturday, May 1.  The activity disconnected the Exhaust Airflow Sensor and repowered the rack to determine whether the Single Fan Failure Caution alarmed (indicating that the issue is in the exhaust leg of airflow) or the Dual Fan Failure Warning alarmed (indicating that the issue is in the intake leg of airflow).  Following disconnection of the sensor, the Single Fan Failure Caution returned upon rack repower, narrowing the failure to the exhaust leg.  The sensor was reconnected, and the team will discuss further steps to isolate this to either a fan or a sensor problem.

Cycle Ergometer with Vibration Isolation and Stabilization (CEVIS) Braking Band Replacement – In order to restore CEVIS Ergometer S/N 1002 as a fully functional on-orbit spare, the crew replaced the worn braking band, inspected and cleaned around the braking band and performed a brief checkout.  This ergometer was previously installed in CEVIS and was removed after braking band performance degraded to the point where excessive sticking was causing workload drift in the data.

NiH2 Battery Disposal Robotic Operations – Ground controllers completed operations to remove the NiH2 Battery Flight Releasable Attachment Mechanism (FRAM) from External Stowage Platform 3 (ESP-3) Site 6 and install the NiH2 battery and FRAM on Cygnus Site 1 for disposal.  As part of these operations, the Mobile Transporter (MT) was translated from Worksite 2 to Worksite 3.  During FRAM mating to Cygnus Site 1, robotic operators applied brakes early to prevent SPDM Arm 1 elbow pitch from entering a singularity, which could cause unpredicted arm motion.  Procedures target 147N steady state force to ensure a good seat of the FRAM prior to driving bolts, but the early braking resulted in a 120N force.  Teams agreed to proceed with an attempt to fasten bolts, which was successful, and the battery and FRAM were installed nominally on Cygnus Site 1.

Completed Task List Activities:

  • None

Today’s Ground Activities:
All activities are complete unless otherwise noted.

  • Solidification Using Baffles in Sealed Ampoules Hardware Setup
  • Atmosphere Revitalization System (ARS) Node 3 Carbon Dioxide Removal Assembly (CDRA) Deactivation
  • HRF Rack 2 Rack Power Down Commanding

Look Ahead Plan

Thursday, May 6 (GMT 126)

  • Astrobee on
  • Celestial Immunity
  • CIR bottle gather
  • Food Acceptability
  • Standard Measures/Repository


  • Regenerative Environmental Control and Life Support System (ECLSS) Oxygen Generation System (OGS) Hydrogen Sensor ORU Purge Adapter (HOPA) Operations
  • OGS R&R
  • Adlink Mini PC Restow

Friday, May 7 (GMT 127)

  • AC Touch
  • Astrobee off
  • Celestial Immunity
  • CIR manifold bottle replace
  • ELF sample holder change
  • ESA EPO AstroPi config
  • Food Acceptability
  • Food Physiology
  • JAXA video take 1
  • HRF2 troubleshooting deconfiguration
  • Nanoracks Platform 2 module remove
  • Standard Measures/Repository 


  • Crew Provisions Consolidation
  • Environmental Health System (EHS) – Compound Specific Analyzer-Combustion Products (CSA-CP) Extended Maintenance
  • In-Flight Maintenance Starboard Stall Mounting Bracket Remove & Replace

Saturday, May 8 (GMT 128)

  • AWP Doff
  • Celestial Immunity
  • Standard Measures


  • Weekly Cleaning

Today’s Planned Activities:
All activities are complete unless otherwise noted.

  • Acoustic Monitor Data Transfer and Stow
  • Audit of FGB fans
  • Celestial Immunity MELFI Sample Insertion
  • Celestial Immunity Plate First Sampling
  • Crew Dragon Forward Monthly PCS Checkout
  • Fluid System Servicer (FSS) Gather
  • Fluid System Servicer (FSS) Procedure Review
  • Gather RS items for disposal in NG-15
  • Health Maintenance System (HMS) Automated External Defibrillator (AED) Inspection
  • Health Maintenance System (HMS) Periodic Health Status (PHS) Evaluation – Crew Medical Officer (CMO)
  • Health Maintenance System (HMS) Periodic Health Status (PHS) Evaluation – Subject
  • Health Maintenance System (HMS) Periodic Health Status (PHS) Stow Hardware
  • HRF Generic HRF Centrifuge Frozen Blood Collection Operator
  • HRF Generic MELFI Sample Retrieval And Insertion Operations
  • HRF Generic Saliva Collection 10 Minutes
  • JEM 120 to 28 VDC Conv Mesh Cleaning
  • LSG Primary Crew Restraint Unfold
  • LSG Work Volume Deploy and stow
  • Manufacturing Device Canister Swap
  • On-Orbit Hearing Assessment (O-OHA) with EarQ Software Setup and Test
  • On-orbit hearing assessment using EARQ
  • PAO Preparation
  • Public Affairs Office (PAO) Event in High Definition (HD) – JEM
  • Recharging air conditioning system [СКВ1] from КВО.6003 bottle. Tagup with specialists
  • Transfer Cygnus Cargo Operations
  • Treadmill 2 (T2) Exercise Video Equipment Setup
  • Video recording of Victory Day greetings