What action should a pilot take if they experience an in-flight cabin depressurization?

In the event of in-flight cabin depressurization, the most appropriate action a pilot should take is to use oxygen masks and descend to a safe altitude. This step is critical because the cabin altitude increases rapidly during depressurization, which can lead to hypoxia—a condition caused by insufficient oxygen in the bloodstream. By utilizing the oxygen masks, both the pilots and passengers can maintain adequate oxygen levels until the aircraft descends to a lower altitude where breathable air is available.

Descending to a safer altitude is also essential since it reduces the risk of hypoxia and allows for normal physiological conditions to be reestablished. Generally, a descent to around 10,000 feet or below is recommended unless operational conditions dictate otherwise.

This procedure ensures the safety of all on board and stabilizes the situation effectively, allowing time for the flight crew to assess and manage further actions, such as contacting air traffic control or preparing for an emergency landing if necessary.