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757 Captain III >> 757 Captain III - General >> Change BTWN DH & MDA https://www.captainsim.org/forum/csf.pl?num=1519948973 Message started by Dreamflight767 on Mar 2^nd, 2018 at 12:02am

Title: Change BTWN DH & MDA
Post by Dreamflight767 on Mar 2^nd, 2018 at 12:02am

Hello:

How do you switch between DH and MDA?

Thanks.

Title: Re: Change BTWN DH & MDA
Post by Swood721 on Mar 2^nd, 2018 at 4:20am

There’s no way to change between the two, per se. For MDA, one would use the orange bug on the primary altimeter. If the MDA is, for example, 1300 you would set the bug over the ‘3’ on the altimeter. If you are conducting a CAT II or III approach and need DH, that is located on the EFIS Control Panel by the Captain’s right knee. At the top of the panel you will see a knob and a digital display that allows you to select DH. The DH value will also display on the PFD.

Title: Re: Change BTWN DH & MDA
Post by Airlnkr on Mar 12^th, 2018 at 5:11pm

The 757 has no MDA function because VNAV is preffered so the profile for the 757 does not do step downs on GPS/Localizer approaches...it is a constant angle descent to a MAP (Missed Approach Point....it took me a while to understand this but eventually it becomes second nature...

Title: Re: Change BTWN DH & MDA
Post by Dreamflight767 on Mar 14^th, 2018 at 4:07am

Interesting. Thank you.