CHAPTER 16 DAY IN THE LIFE: IN-FLIGHT MAINTENANCE 270 Table 1. Summary of ISS Tools and Diagnostic Equipment for use in the Pressurized ISS Environment In-Flight Maintenance Tools Description ISS Toolbox (Figure 1) A box of five sliding drawers that stores a majority of the ISS hand tools. The toolbox contains various sizes of wrenches, sockets, ratchets, torque wrenches, screwdrivers, pliers, L-wrenches, hammers, pry bars, files, tape measures, saws, feeler gauges, chisels, and punches. Many tools are available in both metric and standard sizes. Multiple sets of the commonly used tools are kept on the ISS to provide spares and to allow more than one crew member to use the same size/type of tool at the same time. Power Tools The handheld, battery-operated power tools on the ISS include driver drills, impact drivers, and the necessary drill bits, batteries, and chargers. Repair Kits The repair kits on the ISS include a generic parts kit that contains hose clamps, hose menders, hex nuts, zip ties, fasteners, countersunk screws, solid-state relays, switches, breadboards, potentiometers, capacitors, resistors, light- emitting diodes, transistors, diodes, circuit board fuses, cartridge fuses, knobs, tape, and foam. Additional repair kits include an Ethernet kit, soldering kit, wireway and coldplate covers, clamp and bracket kit with rivet gun, light-duty and heavy-duty sewing kits, screw extractor kit, and tap and die kit. Electrical Tools For electrical repairs, the ISS has a Scopemeter, which is a combination multimeter and oscilloscope, a current probe, a temperature probe, a pressure probe, a multimeter, and oscilloscopes. Two pin kits contain a number of wires of various gauges as well as pins and sockets to enable crew members to create their own jumper wires. These kits also have the various plugs and adapters needed for use with the Scopemeter and multimeter to take measurements on the ISS wiring. Diagnostic Equipment For troubleshooting and investigating maintenance problems, the ISS has diagnostic measurement software, a diagnostic power supply and accessories, a databus analyzer kit, Breakout Box, Multiplexer/DeMultiplexer On-Orbit Tester, electrical cable tester, fiber optic diagnostic and cleaning kits, and a fiberscope kit. Fluid Servicing (Figure 2) A Fluid System Servicer is used to drain and fill fluid lines inside the ISS. A fluid fitting torque device is used to mate and demate gamah-type fluid connections, which require very high torque to fully seal them. Fluid sampling tools are used to take and test fluid samples in the various internal thermal control loops. Leak and Fire Maintenance equipment will be needed in the cleanup after an overboard leak or a fire on the ISS. Kits to support that work include the ISS Leak Kit and the Post-Fire Cleanup Kit. The ISS Leak Kit contains patches for sealing small holes to vacuum in the pressure shell as well as the Ultrasonic Leak Detector to help the crew find the leak point. The Post-Fire Cleanup Kit includes the tools and adapters needed to clean combustion by-products out of the cabin air after a fire has been extinguished. Figure 1. The ISS toolbox in Node 1. Figure 2. Shannon Walker with the Fluid System Servicer.