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Pressurization question

Scheduled Pinned Locked Moved 146 Professional
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  • M Offline
    M Offline
    MadMaxQcZ
    wrote on last edited by
    #1

    First the first time yesterday I decided to activate ''State saving'' on the aircraft ... During my flight today I notice that my pressurization system was not working at all in the air even if my altitude is set correctly on it ... pressure stayed at ground level even if I was flying at 29'000 ft. Don't know if it's related to that ''State saving'' or not but I followed the checklist as usual.

    For people with more knowloedge than me what can cause the pressurization system to stay at ground pressure and not pressurizing the aircraft ?

    Thx :)

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  • T Offline
    T Offline
    Toozin
    replied to MadMaxQcZ on last edited by
    #2

    @madmaxqcz You did have the packs turned ON?............................and completed the airs change-over?

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  • J Offline
    J Offline
    jmarkows
    wrote on last edited by
    #3

    I know this is an old post but I just had the same thing happen to me. I normally shut everything down after I'm done, but I wanted to do a "turnaround," so yesterday after landing I did everything but the Leaving the Aircraft checklist and quit MSFS normally.

    I started up today and everything seemed as it should have been, except I noticed on the ground the pressurization gauge pegged at -2000fpm. I thought perhaps it was an artifact of the doors being opened, so I went on my way.

    At a few thousand feet I noticed that the cabin was rising at a normal rate, but the pressure was pegged at -2000ft and only the delta was rising. Everything normal, no failures (did a Repair All from the EFB anyway), even going to manual pressurization and fully opening the valves doesn't change cabin altitude.

    Using the 300QT with a third party livery.

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  • J Offline
    J Offline
    jmarkows
    wrote on last edited by
    #4

    And now the cabin pressure is finally rising and the differential is lowering, it's like it was stuck at some large negative altitude value.

    I'll see if I can duplicate it leaving things running and then quitting the sim.

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  • J Offline
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    jmarkows
    wrote on last edited by
    #5

    I did the same thing; follow the EFB checklists through the Shutdown but not the Leaving Aircraft, and quit to menu then the sim. Restarted the sim and loaded into the plane, and I saw the pressurization gauge pegged at -2000fpm, but this time only briefly before it went back to zero.

    I was unable to coax the 146 into pressurizing on the ground, but I did an abbreviated rush job just to get airborne and right off the ground the cabin altitude starting rising as it should be.

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  • A Offline
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    Avionic
    replied to jmarkows on last edited by
    #6

    @jmarkows I've experienced that weird issue with pressurisation multiple times in the 146. Never been able to figure out what exactly triggers this condition, so never reported it.

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