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If you have a pressurization emergency, and select EMER on the pressurization panel, what happens?
Hot air from the left engine is forced directly into the cabin.
It does not go through the ACM
What's the difference between NORM and GND on the Pressure Source Selector?
Norm sends air to the ACM at 12 pounds per minute from both engines.
GND sends air to the ACM at 18 pounds per minute from just the left engine
When will with pressurization system automatically go to EMER all by itself?
When the air through the ACM exceeds 435 degrees F
At what temperature will the AIR DUCT O'HEAT light go on?
315 degrees F
It's possible to over-pressure the ACM.
How would you know if it's over-pressured on the ground?
The BLEED AIR GND light might go out
Reduce the throttle and reset the NORM PRESS breaker
How would you know if the ACM over-pressures in flight?
BLD AIR GND
The air duct overheats at 315 degrees. How hot is the ACM before it overheats?