With the loss of hydraulic system B, (system A operating normally):
A.A.Main yaw damper functions are available as long as hydraulic system A is providing normal pressure and the yaw damper switch is ON
B.B.Standby yaw damper functions are available as long as hydraulic system A is providing normal pressure and the yaw damper switch is ON
C.C.Main & standby yaw damper functions are lost
D.D.Standby yaw damper functions are available if the FLT CONTROL B switch is placed to STBY RUD and the YAW DAMPER switch is reset to ON
正确答案是C