In an Emergency Descent Mode scenario, to what altitude is the altitude selector typically set?

In an Emergency Descent Mode scenario, to what altitude is the altitude selector typically set?

• A. 15,000 feet.
• B. 10,000 feet.
• C. 20,000 feet.
• D. 12,000 feet.

Answer: (A)

Emergency Descent Mode uses a fixed target altitude to establish a rapid, controlled descent so the airplane reaches a safe, breathable environment as quickly as possible. The altitude selector being set to 15,000 feet provides a reliable balance: it’s low enough to bring the aircraft into a pressurized, comfortable cabin environment soon, yet high enough to maintain safe handling and maneuver margins and to clear terrain and airspace constraints during the descent. This target aligns with standard cabin-pressurization performance on most jets, meaning occupants are protected from hypoxia without pushing the system beyond its limits. Using a lower target like 10,000 feet can demand a more aggressive descent and stress the system, while a higher target like 20,000 feet delays reaching a safe cabin environment. A setting like 12,000 feet isn’t the typical, widely accepted EDM target, so 15,000 feet is the best and most practical choice.

Emergency Descent Mode uses a fixed target altitude to establish a rapid, controlled descent so the airplane reaches a safe, breathable environment as quickly as possible. The altitude selector being set to 15,000 feet provides a reliable balance: it’s low enough to bring the aircraft into a pressurized, comfortable cabin environment soon, yet high enough to maintain safe handling and maneuver margins and to clear terrain and airspace constraints during the descent. This target aligns with standard cabin-pressurization performance on most jets, meaning occupants are protected from hypoxia without pushing the system beyond its limits. Using a lower target like 10,000 feet can demand a more aggressive descent and stress the system, while a higher target like 20,000 feet delays reaching a safe cabin environment. A setting like 12,000 feet isn’t the typical, widely accepted EDM target, so 15,000 feet is the best and most practical choice.