A method for providing flight path angle information on a primary flight display of an aircraft, the method comprising: receiving, from a user interface, a target airspeed; receiving, from a navigation system, navigation data comprising a flight path angle, attitude, and airspeed; receiving, from on-board sensors, sensor data comprising environmental data and engine thrust status; at a control module, processing the navigation data, the sensor data, and the target airspeed, to determine (i) a maximum predicted potential flight path (max PPFP), defined by a maximum thrust at the target airspeed, and (ii) an idle predicted potential flight path (idle PPFP), defined by an idle thrust at the target airspeed; commanding the PFD to render, (i) the flight path angle, and (ii) a first symbol that represents the max PPFP and a second symbol that represents the idle PPFP; characterized by: determining that the aircraft is in a speed controlled zone, in which speed is automatically controlled by managing engine thrust, when the max PPFP is greater than the FPA, and the FPA is greater than the idle PPFP; commanding the PFD to display "SPEED" in a first designated area and "CRZ" to indicate that the engine thrust is in cruise in a second designated area on the PFD when the aircraft is in the speed controlled zone; determining whether the FPA is more than a configurable predetermined upper margin above the max PPFP; determining a predicted speed associated with the FPA; and commanding the PFD to render a third symbol indicating the predicted speed on an airspeed indicator when the FPA is more than a configurable predetermined upper margin above the max PPFP. receiving, from a user interface, a target airspeed; receiving, from a navigation system, navigation data comprising a flight path angle, attitude, and airspeed; receiving, from on-board sensors, sensor data comprising environmental data and engine thrust status; at a control module, processing the navigation data, the sensor data, and the target airspeed, to determine (i) a maximum predicted potential flight path (max PPFP), defined by a maximum thrust at the target airspeed, and (ii) an idle predicted potential flight path (idle PPFP), defined by an idle thrust at the target airspeed; commanding the PFD to render, (i) the flight path angle, and (ii) a first symbol that represents the max PPFP and a second symbol that represents the idle PPFP; processing the navigation data, the sensor data, and the target airspeed, to determine (i) a maximum predicted potential flight path (max PPFP), defined by a maximum thrust at the target airspeed, and (ii) an idle predicted potential flight path (idle PPFP), defined by an idle thrust at the target airspeed; commanding the PFD to render, (i) the flight path angle, and (ii) a first symbol that represents the max PPFP and a second symbol that represents the idle PPFP; characterized by: determining that the aircraft is in a speed controlled zone, in which speed is automatically controlled by managing engine thrust, when the max PPFP is greater than the FPA, and the FPA is greater than the idle PPFP; commanding the PFD to display "SPEED" in a first designated area and "CRZ" to indicate that the engine thrust is in cruise in a second designated area on the PFD when the aircraft is in the speed controlled zone; determining whether the FPA is more than a configurable predetermined upper margin above the max PPFP; determining a predicted speed associated with the FPA; and commanding the PFD to render a third symbol indicating the predicted speed on an airspeed indicator when the FPA is more than a configurable predetermined upper margin above the max PPFP. determining that the aircraft is in a speed controlled zone, in which speed is automatically controlled by managing engine thrust, when the max PPFP is greater than the FPA, and the FPA is greater than the idle PPFP; commanding the PFD to display "SPEED" in a first designated area and "CRZ" to indicate that the engine thrust is in cruise in a second designated area on the PFD when the aircraft is in the speed controlled zone; determining whether the FPA is more than a configurable predetermined upper margin above the max PPFP; determining a predicted speed associated with the FPA; and commanding the PFD to render a third symbol indicating the predicted speed on an airspeed indicator when the FPA is more than a configurable predetermined upper margin above the max PPFP.