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FDAI speed command inverted cueing, roll command bar


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Posted

The current speed cue on the FDAI is reversed. Screenshot2026-04-04223109.png.ffb551de4e41fe625646ab82ba5185c5.png
The yellow ring indicates the relationship between current speed (yellow ring) and commanded speed (center horizontal line) This can be seen in: 

Screenshot2026-04-04223350.png.eb2f3166cf61d1e5373d1039f4917253.png

Commanded speed is 313 knots with an indicated greater than 313, probably 315 or so based on the speed cue on the FDAI, each wide horizontal line indicates 5 knots. 

Screenshot2026-04-04223323.png.4c0d01b5bc9a2288ff394e3aee86e69f.png

Next
The Roll command director will disappear off scale when in heading mode and the commanded roll is maximum
Screenshot2026-04-04224731.thumb.png.86aefe80d4edbeab7ba7505987dd406f.png

It appears the Roll commands a 30° bank angle

 Screenshot2026-04-04224906.thumb.png.e2009900b2345f8cd03a15f9d6bf7596.png

Screenshot2026-04-04225031.png.b9f16db30c45e12f33461764dbd3628d.png

But a standard rate turn in a transport category aircraft is a maximum command of 25 degrees.

Thanks,

Mike

 

Posted

Hi, the command bar is known as well as the FDA. As for the commanded bank, the industry standard as far as I am aware is 25-30 degrees in the bank so I'll need some sort of reference regarding Tristar and Operational Limits in regards to banking. Thank you

Posted
On 4/6/2026 at 10:16 AM, IniJamir said:

Hi, the command bar is known as well as the FDA. As for the commanded bank, the industry standard as far as I am aware is 25-30 degrees in the bank so I'll need some sort of reference regarding Tristar and Operational Limits in regards to banking. Thank you

You are correct that the industry standard is 25 OR 30 degrees. As with all things it depends. Here are all the references I could find to banking and the FD in the AOM

image.png.7ad58d4508253286e341e92eb34a27d0.png

image.png.25b108fd5376542568ac6c0751676e65.png

image.png.1db03caa0821ba7505a0ed7fb62decbd.png

image.png.250284f249c8a05d7b1e704d53097b43.png

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