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Aircraft: Boeing 777-300ER Engine: Turbofan | GE90-115B Aircraft systems explained. *Full authority digital engine control (FADEC). * Compressor surge and stall protection. * Engine servo fuel system. * Variable stator vane system (VSV). * Variable bleed valve system (VBV). * High pressure turbine active clearance control (HPTACC). * Low pressure turbine active clearance control (LPTACC). Major components covered. * Electronic engine control, N1 speed sensor, N2 speed sensor, exhaust gas temperature (EGT) sensors, engine temperature probes and pressure ports. * Low pressure compressor, high pressure compressor, combustion chamber, high pressure turbine and low pressure turbine. * Compressor and turbine casings. * Hydro mechanical unit, variable bleed actuator, variable bleed valve, unison ring, bell crank linkages, LVDT and thrust lever. * Inlet guide vanes, stator vanes and stages. * Rotor blades and stages. * VSV actuator and torsion rods. * H
