B737Theory - Pressure control To survive at altitude the 737 is equipped with an automatic altitude control system by means of pumping air in, and restricting air out. There are two identical
Why is an important flight safety function like pressurizing the passenger cabin done manually with no automatic failsafe? - Quora
![Cabin Pressure Differential Gauge for PMDG 737 Saitek/Logitech Flight Information Panel & SPAD.neXt - YouTube Cabin Pressure Differential Gauge for PMDG 737 Saitek/Logitech Flight Information Panel & SPAD.neXt - YouTube](https://i.ytimg.com/vi/WDV4_SlYGA0/maxresdefault.jpg)