What should be done when an empty shock strut is filled with fluid?

When an empty shock strut is filled with fluid, it is essential to extend and compress the strut completely at least two times to ensure proper functioning. This process allows any trapped air bubbles to be expelled from the hydraulic fluid, effectively eliminating air from the system. The introduction of fluid into the shock strut may create air pockets, and simply filling the strut without cycling it can lead to ineffective damping and a risk of hydraulic failure.

Cycling the strut allows the internal components to interact correctly with the new fluid, ensuring that the shock absorber can perform its intended function by providing appropriate damping during operation. Thus, extending and compressing the strut at least two times is crucial for maintaining the operational integrity of the landing gear system.