PPRuNe Forums - Does the Smith FMS allow at or below speed restrictions?

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Driver 170

31st Oct 2020 09:44

Does the Smith FMS allow at or below speed restrictions?

Per the FCOM;

When modified by the pilot:

“At or above” airspeed restrictions are entered with a suffix letter A (example: 250A/).
“At or below” airspeed restrictions are entered with a suffix letter B (example: 200B/).
Mandatory airspeed restrictions are entered without any suffix letter (example: 220/).

But i’ve been told the Smith’s FMS doesn’t allow 220B and it’s probably down to operator requests.

can someone please shed some light on this.

Thanks

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