Emergency Descent

1. FASTEN BELTS → ON Without delay, descend to the lowest safe altitude or 10,000 feet, whichever is higher

2. ENGINE START switches (both) → CONT

3. Thrust levers (both) → Reduce thrust to minimum or as needed for anti-ice

4. Speedbrake → FLIGHT DETENT If structural integrity is in doubt, limit speed as much as possible and avoid high manoeuvring loads. Set target speed to MMO/VMO. When approaching the level off altitude: Smoothly lower the SPEED BRAKE lever to the DOWN detent and level off. Add thrust and stabilize on altitude and airspeed. Emergency Descent (continued)

5. Crew oxygen regulators → Normal Flight crew must use oxygen when cabin altitude is above 10,000 feet. To conserve oxygen, move the regulator to Normal

6. ENGINE START switches (both) → As needed The new course of action is based on weather, oxygen, fuel remaining and available airports. Use of long-range cruise may be needed