What action should be taken if there is a malfunction with cockpit pressure readings?

When there is a malfunction with cockpit pressure readings, it is crucial to investigate the malfunction. This involves checking the instruments and systems associated with cockpit pressure to determine the cause and extent of the issue. Understanding whether there is actually a problem with cabin pressure is essential for assessing the safety of the aircraft and deciding on appropriate actions.

Investigating the malfunction allows pilots to obtain critical information that could indicate other underlying issues or confirm the cockpit pressures are stable despite erroneous readings. This step is vital in ensuring safe operating conditions for the crew and passengers, as well as in making informed decisions regarding the next steps, which may include maintaining current altitude, descending to a safer level, or activating emergency procedures if necessary.

Monitoring other systems and evacuating immediately without knowing the cause of the malfunction may lead to unnecessary complications or dangers, including potential panic or inappropriate responses to the situation. Disconnecting oxygen systems would further compromise safety in the event of a genuine issue. Therefore, investigating the malfunction is the most logical and safety-conscious approach.