I have a couple of screenshots here…
What does the flashing “AT” mean on my PFD?
And
What does "“TA ONLY” mean?
TIA,
Mike
AT yellow means your AutoThrottle was disconnected.
TA Only means TCAS will only provide traffic advisories (TA) and the resolution advisories (RA) are inhibited.
This differs from TA/RA where the TCAS provides traffic advisories (TA) and resolution advisories (RA) when appropriate.
Moved to User Support Hub Aircraft & Systems that is more appropriate for community support.