Oxygen in Pressurized Baron

[kyrre1978]

Hi,

I have noticed that the green oxygen lever is not present in the pressurized version of the baron. I know, it’s pressurized, so why would you need oxygen, right? Was there somehow that the Baron was still certified despite this ?

[MiRexer]

Looking at https://www.faa.gov/documentLibrary/media/Advisory_Circular/AC_25-20.pdf oxygen wouldn't be required if you can descend to a breathable altitude in time using an emergency descent. There's a calculation there - according to the P Baron POH you can do an emergency descent from the service ceiling of 25k feet down to 10k feet in less than 4 minutes. I'm guessing that it falls within their limits.