RATE CLIMB reads ZERO during climb and descent

[JRBarrett 3,049]

Actually caught it this morning, took a few tries to get a screenshot mid-spin. This is climbing through 6000 out of MSP.

For whatever reason, it appears that your cabin is not pressurized at all in the screen shot. The cabin altitude reads about 6500 feet (same as your aircraft), and the differential pressure (difference between cabin pressure, and the pressure outside of the aircraft) reads zero.Not sure why, as it appears that you have everything set correctly...

[scandinavian13 5,192]

Yeah, Jim, I see the correct settings too.Are you sure you're not using an old panel save, saved flight, or similar?

[lbarber 20]

Nope, all new. This is in the PMDG House Livery 737-700. Doing a complete uninstall/reinstall right now to see if that helps, but it sounds like some users were experiencing this before SP1. I very well could have been having this issue all along and never known about it, I never bothered checking the pressurization gauges on climbout before.

[bakaman 28]

Nope, all new. This is in the PMDG House Livery 737-700. Doing a complete uninstall/reinstall right now to see if that helps, but it sounds like some users were experiencing this before SP1. I very well could have been having this issue all along and never known about it, I never bothered checking the pressurization gauges on climbout before.

Yeah let us know after your reinstallation

[jgoggi 65]

I tested it but everything looks ok (737-800 and SP1). Did you set cruise altitude and landing altitude correctly?

[lbarber 20]

Yep, same deal after the reinstall.

[Spin737 102]

Your outflow valve is full open for some reason, too.

[Tabs 2,790]

We'll take a look at this...

[cdc777 0]

Hi all,I noticed this, too, even before SP1.What seems to happen is the plane begins to pressurize on the takeoff roll, as it should, but after rotation, the outflow valve drives full open. When passing through about 5-7,000 feet (I guess depending on the cruise altitude set on the pressurization panel), the outflow valve begins to close and the plane pressurizes. The cabin climb rate is about zero since the cabin altitude is where it should be at cruise.It also seems inconsistent. Sometimes the plane pressurizes normally and sometimes not.Hope this info helps for troubleshooting!Thanks,Christian Chapman

[cdc777 0]

Did a little more testing...It seems to only happen while departing when the barometric pressure is higher than normal. I manually set the weather with an altimeter setting of 30.10 (or higher) and the outflow valve went full open after takeoff. This was with a "normal" cruise altitude set on the pressurization panel. A workaround is to set the cruise altitude low (around 5000), then reset after takeoff; or, takeoff with packs off then turn on after takeoff.Thanks,Christian

[bakaman 28]

Hi all,I noticed this, too, even before SP1.What seems to happen is the plane begins to pressurize on the takeoff roll, as it should, but after rotation, the outflow valve drives full open. When passing through about 5-7,000 feet (I guess depending on the cruise altitude set on the pressurization panel), the outflow valve begins to close and the plane pressurizes. The cabin climb rate is about zero since the cabin altitude is where it should be at cruise.It also seems inconsistent. Sometimes the plane pressurizes normally and sometimes not.Hope this info helps for troubleshooting!Thanks,Christian Chapman

Good analysis, noticed it too

Did a little more testing...It seems to only happen while departing when the barometric pressure is higher than normal. I manually set the weather with an altimeter setting of 30.10 (or higher) and the outflow valve went full open after takeoff. This was with a "normal" cruise altitude set on the pressurization panel. A workaround is to set the cruise altitude low (around 5000), then reset after takeoff; or, takeoff with packs off then turn on after takeoff.Thanks,Christian

Interesting, i'll try this .

[emvaos 13]

We got this one guys. Thanks all.

[bakaman 28]

I'm just thinking about something, as I'm leaving Florence in italy to Gibraltar in a 700 easyjet. I have the feeling that the cabin climb shows 0 only when flying even flight levels. I am steady at FL380 and during climb phase the needle was stuck on ZERO. RYAN LET US KNOW ON THIS ONE

We got this one guys. Thanks all.

alright, thanks a lot. For your information it also did happen to me the first day of release but with the 600 SAS from Nice to Lisbon: quite the same route . But what is similar is that it was also with even FLs.Furthermore today i did EDLV to Florence in odd level (390) and it worked fine. Hope this help

[FlyingBubbles 15]

Its weird how I noticed this waaay back but my post dissapeared to the bottom of the forum somwhere and Ive had no replies.... weird.....http://forum.avsim.net/topic/352218-736-pressurization-issue/page__p__2145875#entry2145875Regards,MJ O Donnell

[bakaman 28]

Its weird how I noticed this waaay back but my post dissapeared to the bottom of the forum somwhere and Ive had no replies.... weird.....http://forum.avsim.n...75#entry2145875Regards,MJ O Donnell

Yes i saw your post the day a posted mine. and i understood that it was a bugAnother point , i just started my descent and the needle reads now -350ft/min as it should.