What happens to the hydraulic pump if the gear switch is accidentally set to retract while on the ground?

When the gear switch is accidentally set to retract while the aircraft is on the ground, the hydraulic system incorporates a safety mechanism that prevents the hydraulic pump from engaging. This safety feature is designed to avoid any unintended retraction of the landing gear when the aircraft is not in the air.

In most multi-engine aircraft, the landing gear system is designed with built-in safeguards to ensure that critical operations, such as retracting the landing gear, can only occur when the aircraft is in a safe flight mode. This means that if the aircraft is on the ground and the gear switch is inadvertently set to the retract position, the hydraulic pump will remain inactive, thereby preventing gear retraction and ensuring that the landing gear remains safely extended on the ground.

This hydraulic system design is particularly important for the safety of the aircraft and its crew, as it helps to mitigate the risk of accidents that could occur from inadvertently retraction of the landing gear during ground operations.