Gas turbine engine having a hydraulic fan brake

A turbine engine having a longitudinal centerline axis, the turbine engine comprising:

• a turbo-engine comprising a compressor section, a combustor section, and a turbine section in serial flow relationship;
• a fan comprising a plurality of fan blades that rotate about the longitudinal centerline axis;
• a rotational component coupled to the fan;
• a fluid circuit for supplying a fluid to the turbine engine, the fluid circuit including a pressurized manifold and a pump that supplies the fluid to the pressurized manifold;
• and
• a hydraulic fan brake in fluid communication with the fluid circuit via the pressurized manifold, the hydraulic fan brake comprising:
• a hydraulic actuator fluidly coupled to the pressurized manifold, the hydraulic actuator comprising a hydraulic cylinder, a piston disposed at least partially within the hydraulic cylinder, and a biasing member that directly contacts and biases the piston or the hydraulic cylinder;
• and
• a brake pad directly operably coupled to the piston of the hydraulic actuator such that the brake pad moves with the piston and the hydraulic actuator moves the brake pad, via the piston and relative to the rotational component, between a disengaged position, in which the brake pad disengages the rotational component and allows rotation of the rotational component, and an engaged position, in which the brake pad engages the rotational component and prevents rotation of the rotational component, thus preventing rotation of the fan,
• wherein the biasing member is preloaded to bias the brake pad toward the engaged position such that, during operation of the turbine engine, pressurized fluid supplied by the pump to the hydraulic actuator opposes a preload of the biasing member and causes the brake pad to move to the disengaged position, and, upon loss of pressurized fluid supplied to the hydraulic actuator, the preload of the biasing member pushes the brake pad directly to the engaged position while exerting a braking force to the rotational component, via the brake pad, to prevent windmilling of the fan following shutdown of the turbine engine.