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No DOT in Altitude Window

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New to the 350 and I notice there's no DOT in the window. FMA is THR DCLB CLB ALT CRZ FLxxx (400). Any ideas?

  • 2 weeks later...
On 9/1/2026 at 10:38 PM, jsburgess said:

New to the 350 and I notice there's no DOT in the window. FMA is THR DCLB CLB ALT CRZ FLxxx (400). Any ideas?

The dot character that you mean is normally displayed on the FCU that indicates managed speed and altitude?

If so, this is not available on the A350. This is a small change vs the A330/A320 family.

You need to refer to the FMA guidance modes on the PFD to determine which lateral/vertical guidance has been engaged and selected.

  • Author

Wow. Well thanks for that explanation, I did not know that. Every day's a school day they say. I wonder why they decided to do this? Seems strange to me.

Yeah, no idea why Airbus dropped the dot. I know they try and maintain commonality and that's certainly true when comparing say A330 with A340 but with the A350, you have think of it as a next gen, evolutionary step change, so not everything 100% correlates to the "older" aircraft families.

Another nuance, there is no Probe Heat p/b any longer. Instead it's fully integrated into the systems so it's switched on as soon as an engine is running. OK, saving of a switch in the cockpit and related wiring is potentially a cost saving for Airbus and another simplification that pilots dont have to worry about. With the dot not showing on the FCU, that's a different story.🤔

Hopefully an Airbus avionics engineer can explain why they elected to stop displaying the dot?😉

Just to make a correction to the statement I made above , there is still a p/b button for the Probe Heat but it requires in normal circumstances no manual activation as its automatic. Just saw it this morning. For some reason I had in my mind a missing switch but must have been thinking about another aircraft.

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