AMM 32-31-00
The safety valve is an electrically-operated, two-position valve that isolates the Green hydraulic supply to the L/G system. When the computed airspeed is more than 264 kts the safety valve closes (solenoid de-energized). The safety valve opens (solenoid energized) when the computed airspeed is less than 260 kts and the L/G control-lever is selected DOWN.