You are absolutely right, and my company callout includes "QNH" (and we don't operate with QFE), I just thought his specific phrasing was very funny.

Guilty as charged HB, pardon me doubting then. Out of interest, given your "theatre" could your outfit actually do without it?

Murky side story: there is a HW/SW configuration of quite a few airframes, where for a LNAV+VNAV managed app mode executed with QNH you need to set (M)DHinto the FMS for all things to work. While with the same ship, on a non-VNAV apch, (M)DA goes into the box.

After Takeoff/ Cimb Checklist is used after Take off and after a Go Around.
In the first case it is called "After takeoff Checklist" and "Climb Checklist" in case of Go Around. Note the diagonal (/) in it.

We fly from between the Canadian border to Peru, with Bogota being the highest elevation (of the top of my head), AFAIK QFE is mostly former USSR, China? but no place we fly to.

We set DA for all vertical guided approaches (ILS, LNAV/VNAV), and a DDA (derived decision alt = MDA +50') for all non vetical guided approaces, and fly them all similar to an ILS as far as not leveling at the MDA anymore, but flying a 3deg path to the DA/DDA and GA if the required visual contact isn't there. Which things wouldn't work if you didn't set MDH?

ON and OFF is airbus SOP terminology between CM1 CM2. SET and RELEASED is used while communicating with ground crew. They don't read SOPs anyway and maybe as you say to avoid confusion.

check FCOM PRO-NOR-SOP-90 P 9/12 Altimeter setting changes to/from QNH/QFE-STD. Probably you didn't read the FCOM

Why don't you quote that chapter?

The 'On' and 'Off' markings near the Parking Brake lever is just like the 'Up' and 'Down" markings near the Landing Gear Lever.

But the calls as mentioned in the Standard Callouts on the FCOMs are 'Set' and 'Released' for the Parking Brakes. When we need to raise or lower the landing gear, we command "Gear Up" or "Gear Down" and not "Up" or "Down". For that matter there is no "Up" , "Down", "On" or "Off" callouts mentioned in the SOP.

Back to the question of QNH terminology, our company just changed the Before Start, Climb and Descent checklists to have us say: "Baro Ref XX.XX Crosschecked." No reason given for the change, and it's not being well received. FCOM Controls and Indicators describes the window as the "Barometer Reference Display Window," but if we take that logic to the extreme, there are some pretty silly checklist designs around the corner.

(overdue reply) If you did not set MDH, the machine would remove the FD's and disconnect AP at MDA + ELEV. Applies to old QFE machines. https://i.postimg.cc/157RWMT0/IMG-0320.png

It is an oddity by all accounts, but the number of airframes is not negligible. The connection to a part of this thread above is that to discover it needs to be done, your best lead is the "MDH" label in MCDU and in FMA's minima box. Thus it might be prudent to read the "BARO" or "MDA" or "MDH" whilst running the C/L. Just like the QNH / QFE prefix - for some operators.

Not for QFE ops, but for QNH ops with a QFE enabled machine. Apparently, the old ones are actually QFE hardwired with QNH functions on top of the basic circuitry.

The point being made with regards to C/L responses is that it is not defined by the manufacturer and IMHO better staying that way.

Thanks for the reply. I remember reading an OB/OEB about that when I was new, but on our fleet all reference to the AP disconnecting at mins have been removed, not sure if because of updated software or retired hardware. I will look MDH in the MCDU to see if I can find any.