.125 is a specific aircraft restriction... as you can see it exists on the 737 various aircrafts have various requirements. Bottom line - min. pressurization in the event of a ground egress.
I think you meant MAX PSID on the ground....
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.125 is a specific aircraft restriction... as you can see it exists on the 737 various aircrafts have various requirements. Bottom line - min. pressurization in the event of a ground egress.
Pretty sure the F-28, Dc-9 and the 747 (classic anyway) do not pressurize at all on the ground.
Not just the pressure bump either, alot of structural rigidity gain from pre-pressurizing the fuselage.
I think you meant MAX PSID on the ground....