Don the oxygen masks.
Establish crew communications.
Check the cabin altitude and rate.
5. Without delay,
- 4. If the cabin altitude is uncontrollable:
- PASS OXYGEN switch.............. Push to ON and hold for 1 second
descend to the lowest safe altitude or 14,000 feet, whichever is higher. If fuel is not critical, descend to 10,000 feet.
- To descend:
- *Move the thrust levers to idle
- *Extend the speedbrakes
- *If structural integrity is in doubt, limit airspeed and avoid high maneuvering loads
- *Descend at Vmo/Mmo