What is the general guidance during a rapid decompression event?

• A. Engage the autopilot and climb to a higher altitude.
• B. Turn off oxygen and maintain altitude.
• C. Don oxygen, descend to a safe altitude, and follow the rapid decompression memory item to secure the cabin and stabilize the aircraft.
• D. Open a cabin door.

Answer: (C)

Immediate actions in rapid decompression focus on ensuring oxygen, descending to a safe altitude, and securing the aircraft to stabilize the situation. Donning oxygen masks right away protects you from hypoxia as cabin pressure falls, because the quicker the crew and passengers have oxygen, the longer usable consciousness lasts and the safer everyone stays. Descending to a safe altitude—typically 10,000 feet cabin altitude or lower—reduces the oxygen deficit and allows the aircraft to operate more normally while you work to regain stable flight. After establishing oxygen and starting the descent, follow the rapid decompression memory item to secure the cabin and stabilize the aircraft: get crew to their stations, secure loose items, ensure passengers are instructed and oxygen is deployed as needed, and configure and monitor systems so you can safely return to land or resume normal operations. Actions like climbing or engaging autopilot to ascend, turning off oxygen, or opening a cabin door would not address the immediate hazards and are not appropriate in this scenario.