737NG Pressurization System explained | Real 737 Pilot

Let's have a close look at the Pressurization System in the Boeing 737.
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Tools and addons used in this video:
OBS Studio
My system specs:
Intel i9-9900k@5,2GHz
RTX3080Ti
32GB RAM
Windows 10 Pro
My hardware:
Thrustmaster Boeing Yoke and Throttle
Thrustmaster HOTAS Warthog
Thrustmaster Pendular Pedals

[@chrisjung5952]

I had been thinking of asking if you would do some deep dives into systems, but I see as usual you are already on top of it. Thanks, these explanations are fantastic and very much appreciated!

[@ImperrfectStranger]

6:15 Actually, the negative pressure relief valve is even simpler than the diagram. It's a hinged door with a spring on the hinge! The maintenance manual doesn't go into much detail on the mechanism for the positive pressure relief valve except to say there is a pneumatically operated servo mechanism which controls the valve flapper.

[@yams900]

Good work mate !

[@swimskim5874]

Great idea for a topic 👍🏼

[@NTFTimo]

Now we know you fly for Ryanair. Good Video, thanks for that explanation!

[@A330Driver]

I'm not at Ryanair anymore for over a year now ;-)

[@NTFTimo]

@@A330Driver but you were at the time of the video xD. Those who read BFU Unfallberichte know about the incident you mentioned :-))

[@jonathan3107]

Awesome content, thank you so much.

[@A330Driver]

Glad you liked it!

[@FlightSims]

You’re working too much! Take a break, sir! JK of course but… once I get a better connection, I’ll check this out. I’m in the back country right now. Appreciate your extreme info you post. Thanks 🙏

[@BurcuDeniz]

Thank you for all the information. It has been really helpful. Can you please explain how can we understand there is nothing wrong with the pressurization system if there is no manual zero indication? Isn't it so easy to misunderstand the indication in that situation as your colleagues did?

[@richardboll8763]

Simulator induced expectations….. Not the first time!

[@A330Driver]

Absolutely! Training is very important, but it's equally important to make sure it doesn't end up in negative training.

[@dusanmirkovic1915]

This is a great video as are all which you made. I am specially drawn to those you put on lately about B 737 sub systems. Can you please share this pdf document you are using on left hand side? There is no such pdf in my Documents folder within PMDG 737 installation.

[@A330Driver]

The document was delivered 11 years ago with the PMDG 737 NGX for FSX. It is no longer included in the latest MSFS release due to licensing reasons. I'm afraid since it is copyrighted I am not allowed to share it.

[@dusanmirkovic1915]

@@A330Driver Not a problem at all. I'll just sniff around the Net 🤫

[@animalflight]

@@dusanmirkovic1915 sorry.... it was this one: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/www.pilot18.com/wp-content/uploads/2017/01/B-737-7-8-900_FCOM_TBC_C_080125_V1V2_B8P-C.pdf. this is the FCOM I found.... not PMDG's though

[@aviationspecialist6644]

how does Helios flight 522 fucked up by the pressurization setting???

[@A330Driver]

Have a look at the aircraft investigation episode on the flight, it's really good!

[@echosierrakilo2089]

I am getting the long needle usually just below or even at the beginning of the red zone in PMDG during cruise. Is it a problem or normal? I think I properly set FLT ALT, but it’s a bit confusing

[@A330Driver]

The big needle indicates differential pressure. Something around 8PSI is totally normal in cruise at high flight levels.

[@echosierrakilo2089]

@@A330Driver thank you for the reply, good to know 👍🏻

[@tonymcflattie2450]

NG? Panel looks more like dc3, lol

[@aviationspecialist6644]

what do you mean B737 NG?

[@A330Driver]

Sorry? I can't follow.