Final answer:
During preflight inspections, the hydraulic reservoir quantity should be checked to ensure it is within the specified range to maintain proper functioning of the hydraulic system.
Step-by-step explanation:
During the preflight inspections, the hydraulic reservoir quantity should be checked to ensure it is within the specified range. This is important because the hydraulic system relies on the proper amount of fluid to function correctly. If the quantity is too low, it may indicate a leak or other issue that needs to be addressed before flight. If the quantity is too high, it can lead to pressure buildup and potential system damage.
A rule of thumb suggests that the reservoir's volume should equal three times the rated output of the system's fixed-displacement pump or mean flow rate of its variable-displacement pump. This means a system using a 5-gpm pump should have a 15-gal. reservoir.