Fig. 10
From: Explainable AI for post-hoc and pseudo-post-hoc predictive maintenance of governor valve actuators

Types of GVA faults. (a) Servo valve failure; (b) Broken springs; (c) Solenoid valve malfunction; (d) C0 Clogged throttle orifice; (e) Cylinder leakage; (f) Cylinder leakage.