What action should be performed if a slide is found to be incapable of holding air?

When a slide is found to be incapable of holding air, the most appropriate action is to notify the inflight support center. This is crucial because the inflight support center can provide guidance and resources to address the situation effectively. They may instruct the crew on how to manage passenger safety and any necessary procedures for dealing with a malfunctioning slide.

Notifying the inflight support center allows for a coordinated response, which may include redirecting the aircraft, alerting ground personnel, or preparing for an alternative evacuation method if required. This step ensures that all actions taken follow the airline's emergency protocols and that passenger safety remains the top priority.

While using a backup slide or considering a manual evacuation might seem like immediate options, these actions should only be implemented with guidance from the inflight support center after assessing the situation. Simply notifying maintenance personnel would not address the immediate needs of passenger safety in-flight.