Which procedure is used to manage rapid descent due to cabin pressurization loss?

• A. Cabin altitude or emergency descent procedure
• B. Controlled descent with spoiler deployment
• C. Stabilized approach procedure
• D. Emergency evacuation procedure

Answer: (A)

When cabin pressurization is lost, the immediate danger is hypoxia at high altitude, so the aircraft must be descended to a breathable altitude as quickly as possible. The procedure designed for this situation is the cabin altitude or emergency descent. It starts with the crew and passengers donning oxygen, seat belts fastened, and the airplane configured for a rapid—but controlled—descent. The descent is continued until the cabin altitude is down to a safe level (typically around 10,000 ft or lower), after which normal operations can resume or the aircraft can proceed to a suitable airport. If needed, speed brakes can help manage the rate of descent, and ATC is contacted for priority handling. This approach specifically addresses the depressurization scenario, whereas the other options refer to approaches, stabilizing for landing, or evacuations—phases or actions that aren’t the immediate response to loss of cabin pressure.