What happens if hydraulic pressure is lost in the landing gear system?

If hydraulic pressure is lost in the landing gear system, mechanical systems can be employed to lower the landing gear. This is an essential safety feature designed to ensure that the aircraft can still safely land, even if there is a failure in the hydraulic system. Most aircraft are equipped with a manual release mechanism that allows flight crews to deploy the landing gear using mechanical or backup systems. This ensures that the aircraft can land safely despite potential failures of the main hydraulic system.

The other options describe scenarios that are not accurate in the context of hydraulic failure. For example, the gear does not automatically retract if pressure is lost; instead, it typically would remain in its current position until an action is taken. In addition, the landing gear can usually be lowered through backup systems regardless of electric power. Thus, understanding the mechanical systems available for lowering the gear is crucial for maintaining safety in flight operations.