SYSTEM AND METHOD FOR PURGING A FUEL MANIFOLD OF A GAS TURBINE ENGINE USING A PUMP

A method of operating a gas turbine engine (10B) in a low-power condition includes supplying fuel to a combustor (16B) by supplying fuel to a first fuel manifold (62A) and a second fuel manifold (62B) of the gas turbine engine (10B). The method also includes, while supplying fuel to the combustor (16B) by supplying fuel to the first fuel manifold (62A): stopping supplying fuel to the second fuel manifold (62B); and using a pump to drive gas into the second fuel manifold (62B) to flush fuel in the second fuel manifold (62B) into the combustor (16B) and hinder coking in the second fuel manifold (62B) and associated fuel nozzles (61B).