[Username Protected]

Where does one find data for expected cabin altitude by Flight Level? I know the cabin alt is 8000 at FL410 (phenom 100), but is there a table or chart that shows what the cabin altitude is at FL350 or FL300?

Side note on cabin alt: One of the good mentor pilots (Sean) introduced me to the 10-4 rule of thumb, through 10,000ft delta-p should be around 4.0. I’m going to add that my own checklist because there’s nothing about verifying pressurization like that in the QRH checklists.

Anyone else have good pressurization rules of thumb or other points in your flows or checklists where pressurization appears?

[Username Protected]

Take a look at QRH NAP1-23

FL300 4,700
FL350 6,200

[Username Protected]

Thank you (Username Protected)! I knew I’d seen that before. Here’s the full list for anyone following

[Username Protected]

for the -300 it is NAP1-21, similar chart, significantly lower altitudes and up to 450.