Which statement describes what triggers the hydraulic pump in the Seminole gear system?

Which statement describes what triggers the hydraulic pump in the Seminole gear system?

• A. The gear switch is moved to UP drives the hydraulic pump
• B. The hydraulic reservoir pressure exceeds limit
• C. The landing gear doors open
• D. Gear switch UP triggers the hydraulic pump to begin pushing high-pressure fluid through the high-pressure side, into the actuator

Answer: (D)

The essential idea is that moving the gear handle to UP energizes the hydraulic pump, and that pump sends high-pressure fluid to the actuator to retract the landing gear. When the gear switch is in UP, the pump begins pushing hydraulic fluid through the high-pressure line into the actuator that drives the gear to retract. This describes both what starts the action (the UP switch) and the path the fluid takes (high-pressure side to the actuator). The other possibilities don’t describe the trigger correctly: pressure exceeding a limit would typically trigger a relief condition rather than energize the pump, and simply opening the gear doors is a result of the gear moving, not the trigger for the pump.

The essential idea is that moving the gear handle to UP energizes the hydraulic pump, and that pump sends high-pressure fluid to the actuator to retract the landing gear. When the gear switch is in UP, the pump begins pushing hydraulic fluid through the high-pressure line into the actuator that drives the gear to retract. This describes both what starts the action (the UP switch) and the path the fluid takes (high-pressure side to the actuator).

The other possibilities don’t describe the trigger correctly: pressure exceeding a limit would typically trigger a relief condition rather than energize the pump, and simply opening the gear doors is a result of the gear moving, not the trigger for the pump.