OVERPRESSURIZATION
1. Pressurization System Select - MANUAL. Control pressurization with the manual toggle switch.
IF STILL OVERPRESSURIZED
2. Air Source Select - L or R; control cabin pressure with throttle.
IF UNABLE TO CONTROL
3. Oxygen Masks - DON and 100% OXYGEN.
4. Oxygen Control Valve - MANUAL DROP.
5. Passenger Oxygen - ENSURE passengers are receiving oxygen.
6. Oxygen Microphone Switches - MIC OXY MASK.
7. Passenger Advisory Light - PASS SAFETY.
8. Air Source Select - OFF.
9. Emergency Descent - AS REQUIRED.
IF STILL OVERPRESSURIZED
10. CABIN DUMP Switch - DUMP.