Figure 12-27.--Electric solenoid shutoff valve.
Fa i l u r e o f t h e e l e c t r i c a l s y s t e m t o t h e
remain on its lower seat, and the pressure of the flight
electrohydraulic shutoff valve. The pressures of the
control system will work on the lower working area.
flight control and utility systems are normal, and there
This holds the poppet of its seat and allows the pressure
is no electrical power to the solenoid. In this condition,
of the utility systems to flow downstream from the
the solenoid cannot be energized, the pilot ball will
location of the valves.