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kevinh

747-400X Minimum display on PFD

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Initially only the BARO minimums (MDA) is displayed. If I select RADIO for minimums the DH appears but the MDA remains displayed on the PFD. Surely either DH or MDA should be displayed, not both?Kevin


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It's correct behavior. Most airlines choose to have Baro as there standard to be displayed on the PFD and have an optional DH available for precision approaches.

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If you dial down to negative numbers, eventually the selected minimum display (either baro or radio) will disappear. You select whether you're using the radio or baro minimum based on the type of approach you're flying.

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