What is one of the checks for PDI's escape slides?

One of the key checks for PDI's escape slides is to ensure that the pressure gauge is in the serviceable band. This is crucial because the pressure gauge indicates if the slide is fully inflated and capable of functioning effectively in an emergency evacuation. A slide that does not have the correct pressure may fail to deploy properly, potentially jeopardizing the safety of passengers during an evacuation. The serviceable band serves as an indicator that the slide has been adequately maintained and is ready for use when needed, ensuring that it operates effectively under emergency conditions.

While marking escape routes, ensuring passengers are seated, and testing emergency exit lights are all important safety considerations, they do not directly pertain to the operational readiness of the escape slides themselves.