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johnb67

johnb67

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  • johnb67
    johnb67 replied to the topic Pressurization in ATA 21 Air Conditioning & Pressurization
    Editing
    Topic-icon Pressurization
    Also is that cabin Altitude climbs as we go above 28000 ft but the differential pressure stays at 7.45 psi it should go up to 7.8 psi
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  • johnb67
    johnb67 created a new forum post in ATA 21 Air Conditioning & Pressurization
    Editing
    Topic-icon Pressurization
    Problem On a Boeing 737-300,400
    Climbing to 27000 ft the pressurization system works fine7.45 psi, on the cross over to 28000 feet the system falls behind and seems to climb as the aircraft climbs pressure is above 7.8 and higher.

    We have changed the controller panel, pressure controller and the Delta P no difference


    Please advise
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