Abstract: A bleed air balancing system includes a plurality of bleed air flow paths (12) each carrying bleed air from one of a plurality of gas turbine engines (10), each bleed air flow path (12) including a flow rate sensor (19), and a circuit (52, 200) outputting at least one flow rate setpoint based on flow rates measured by each of the flow rate sensors (19), wherein each of the plurality of bleed air flow paths (12) includes: a pressure regulating valve (16), a pressure sensor (18), and a controller (20) for controlling the position of the pressure regulating valve (16), the controller (20) including an output (26) connected to the pressure regulating valve (16), a pressure control loop (60) generating a pressure correction signal, and a flow control loop (62) generating a flow correction signal, wherein the controller (20) outputs a control signal (28) on the output (26) based on the pressure correction signal and the flow correction signal. A method of operating the system is also disclosed.