Systems and methods for filling a fuel manifold of a gas turbine engine

An electronic device comprising:

• a processor configured to:
• in response to exiting a non-full non-filling state of a gas turbine engine in which a secondary fuel manifold of the engine is at least partially empty and is not receiving fuel at a fuel flow that exceeds a threshold filling fuel flow, initiate filling the secondary fuel manifold of the engine, including:
• set at least one engine schedule limit based on a measured value of scheduling parameters that is within a first range that corresponds to a non-full state of the secondary fuel manifold;
• determine whether the filling of the secondary fuel manifold is completed;
• and
• adjust the at least one engine schedule limit to control at least one operational parameter of the engine, in response to a determination that the filling of the secondary fuel manifold is completed, by setting the at least one engine schedule limit based on the measured value of the scheduling parameters that is within a second range that corresponds to a full state of the secondary fuel manifold the at least one engine schedule limit based on the measured value within the second range is less than the at least one engine schedule limit based on the measured value within the first range, wherein the at least one engine schedule limit includes an engine core acceleration (ECA) limit.

A non-transitory computer readable medium embodying a computer program, the computer program comprising computer readable program code that when executed causes at least one processor to:

• in response to exiting from a non-full non-filling state of a gas turbine engine in which a secondary fuel manifold of the engine is at least partially empty and is not receiving fuel at a fuel flow that exceeds a threshold filling fuel flow, initiate filling the secondary fuel manifold of the engine, including:
• set at least one engine schedule limit based on a measured value of scheduling parameters that is within a first range that corresponds to a non-full state of the secondary fuel manifold;
• determine whether the filling of the secondary fuel manifold is completed;
• and
• adjust the at least one engine schedule limit to control at least one operational parameter of the engine, in response to a determination that the filling of the secondary fuel manifold is completed, by setting the at least one engine schedule limit based on a measured value of the scheduling parameter that is within a second range that corresponds to a full state of the secondary fuel manifold the at least one engine schedule limit based on the measured value within the second range is less than the at least one engine schedule limit based on the measured value within the first range, wherein the at least one engine schedule limit includes an engine core acceleration (ECA) limit.