What action should you take when the latch on the regulator is activated?

When the latch on the regulator is activated, releasing the latch is the appropriate action to take. The latch is designed to keep the regulator securely attached to the breathing apparatus, and when it is activated, it indicates that the regulator is either disconnected or in a state that requires it to be reset or re-engaged. By releasing the latch, you allow the regulator to either re-establish its connection or to be inspected for functionality, ensuring that the SCBA is safe and operational for use.

In this context, engaging the latch would only be necessary after ensuring the regulator is properly attached and functioning, while checking system status is generally a good practice but not immediately relevant when the latch is activated. Replacing the regulator should only occur if there is a confirmed fault or damage after inspection, rather than as an immediate response to an activated latch.