According to our FCOM: PRO-NOR-SOP- Standard Callouts:
« The PF should call out any FMA change, unless specified differently. Therefore, the PF Should announce:
- All armed modes with the associated color (e.g blue, magenta): « G/S blue », « LOC blue »
- All active modes without the associated color ( e.g. green, white) : « NAV », « ALT ».
The PM should check and respond, « checked » to all FMA changes called by the PF. »
I’m not a big fan of FMA reading. I’m just following the SOP. But I have to admit, that « ALT » blue is the one of the FMA change I always monitor carefully as I know if we are climbing or descending and it’s not displayed, something is wrong.