A FUEL STAGING SYSTEM FOR A GAS TURBINE ENGINE

There is disclosed a fuel staging system for a gas turbine engine, the fuel staging system comprising a plurality of fuel injectors each comprising a mains burner. It comprises a mains manifold connected to a mains delivery line and configured to distribute fuel from the mains delivery line to the mains burner of each of the plurality of fuel injectors, and a check valve disposed in the mains delivery line upstream of the mains manifold. The check valve is configured to permit flow of fuel from the mains delivery line to the mains manifold when the pressure of fuel in the mains delivery line exceeds a threshold pressure.