On Fri, 2 Jan 2004 23:09:12 -0500, "John Gilmer"
wrote:

Just how does the psia in the cabin track the psia "ambient."

This information is fed to the pressure controller by the Air Data
Computer (ADC) on older aircraft and by the Air Data Inertial
Reference Unit (ADIRU) on newer aircraft.

-J

Jack Davis
B-737


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