Considerations
Emergency descent maneuver is designed to bring the airplane down smoothly to a safe altitude, in the minimum time, with the lease possible passenger discomfort.
⦁ If the descent is performed because of a rapid loss of cabin pressure, crew members should place oxygen masks on
and establish communication at the first indication of a loss of cabin pressurization.
⦁ Verify cabin pressure is uncontrollable, and if so begin descent. If structural damage exists or is suspected, limit
airspeed to current speed or less. Avoid high maneuvering loads.
⦁ Perform the maneuver deliberately and methodically. Do not be distracted from flying the airplane.
⦁ If icing conditions are entered, use anti-ice and thrust as required.
⦁ The PM checks the lowest safe altitude, notifies ATC, and obtains an altimeter setting (QNH). Both pilots should verify
that all memory items have been accomplished and call out any items not completed.
⦁ Level off at the lowest safe altitude or 10,000ft, whichever is higher. Lowest safe altitude is the Minimum Enroute
Altitude (MEA), Minimum Off Route Altitude (MORA), or any other altitude based on terrain clearance, navigation aid
reception, or other appropriate criteria.
⦁ If severe turbulent air is encountered or expected, reduce to the turbulent air penetration speed.
⦁ After Level off, recheck the pressurization system and evaluate the situation.
- Consider communication with:
Flight attendants to determine status of the cabin.
ATC to advise of intentions and secure appropriate clearances.
Passengers, using PA.
Operation Control or Flight Dispatcher to help determine a new course of action based on weather, oxygen, fuel
remaining, medical condition of crew and passengers, and available airports, etc.
Go~ ^^