S T I-7 Tachometers...............................................................10-30 Electric tachometers ...............................................10-30 Mechanical tachometers .........................................10-30 Technician certification .............................................16-59 Temperature and altitude ...........................................16-22 Temperature measuring instruments..........................10-36 Tetrodes........................................................................11-6 Theory of Refrigeration Basic vapor cycle....................................................16-45 Thermal electric anti-icing.........................................15-10 Thermal pneumatic anti-icing ......................................15-4 Thermal switch system ................................................17-2 Thermocouple system ..................................................17-3 Thermocouple temperature indicators .......................10-39 Turbine gas temperature indicating systems ..........10-40 Tire classification.......................................................13-75 Bias ply or radial ....................................................13-77 Ply rating ................................................................13-77 Tube-type or tubeless .............................................13-77 Types ......................................................................13-75 Tire construction ........................................................13-77 Carcass plies ...........................................................13-78 Sidewall ..................................................................13-79 Chine...................................................................13-79 Seals ...........................................................................12-35 Backup rings...........................................................12-37 Gaskets ...................................................................12-37 O-ring installation...................................................12-38 O-rings....................................................................12-36 Color coding .......................................................12-37 Seal materials .........................................................12-38 U-ring .....................................................................12-36 V-ring packings ......................................................12-36 Wipers ....................................................................12-38 Semiconductor diodes..................................................11-8 Semiconductors............................................................11-7 Servicing gaseous oxygen..........................................16-17 Draining an oxygen system ....................................16-17 Filling an oxygen system........................................16-17 Leak testing gaseous oxygen systems ....................16-17 Purging an oxygen system......................................16-19 Servicing shock struts ................................................13-12 Shielding ....................................................................11-74 Shimmy dampers .......................................................13-32 Non-hydraulic shimmy damper..............................13-34 Piston-type..............................................................13-33 Steering damper......................................................13-33 Vane-type ...............................................................13-33 Shock absorbing and non-shock absorbing  landing gear..................................................................13-6 Bungee cord..............................................................13-7 Leaf-type spring gear................................................13-6 Rigid .........................................................................13-7 Shock struts ..............................................................13-8 Shock strut operation .................................................13-12 Silicon controlled rectifiers........................................11-13 Single disc brakes ......................................................13-43 Fixed-disc brakes....................................................13-45 Floating disc brakes................................................13-43 Small airplanes Pump feed systems .................................................14-10 Small multiengine (reciprocating) aircraft fuel  systems.......................................................................14-12 High-wing twin ......................................................14-12 Low-wing twin .......................................................14-12 Small single-engine aircraft fuel systems ..................14-10 Gravity feed systems ..............................................14-10 High-wing aircraft with fuel injection system........14-11 Smoke detectors ...........................................................17-8 Ionization type..........................................................17-8 Light refraction type.................................................17-8 systems.........................................................................17-2 Rigid removable fuel tanks ........................................14-19 Smoke, flame, and carbon monoxide detection  systems.........................................................................17-8 Solid state magnetometers .........................................10-47 Sources of operating air .............................................15-13 Turbine engine bleed air.........................................15-13 Sources of power for gyroscopic instruments............10-47 Sources of pressurized air ..........................................16-24 Turbine engine aircraft ...........................................16-26 Stall warning and angle of attack (AOA)  indicators....................................................................10-33 Static discharge wicks................................................11-74 Support........................................................... 13-15, 13-16 Surface ignition and preignition...................................14-5 Synchroscope .............................................................10-33 Synchro-type remote-indicating instruments.............10-26 DC Selsyn systems .................................................10-27 System servicing ........................................................16-55 Charging the system ...............................................16-58 Checking compressor oil ........................................16-58 Evacuating the system ............................................16-58 Feel test ..................................................................16-57 Leak test .................................................................16-56 Performance test .....................................................16-57 Purging the system .................................................16-57 Visual inspection ....................................................16-56