Originally Posted by
JustAnotherNigel
This is fascinating. I’ve delved into the rather large Airbus manuals and Airbus seem to have it on their “not important enough to tell the pilots (or crew)” list - among many other things. It merely says for all of them it can come on and off with Flaps 1 selected or gear down. Makes no specific reference to which is which. Also seems odd that only a handful are different which perhaps indicates it’s a mistake.
Our matrix with all the variants and differences - there’s a lot of them across the fleet unsurprisingly - says TTNA to TTNR are identical fits and that function isn’t even listed as even one of the things that could be different.
It is interesting and potentially explains something I observed. I was on an A330 (OT for BA obviously) where the seatbelt sign was switched on during the descent but then went off silently when the flaps were deployed and then came back on silently during the post-landing taxi. I duly reported this to the crew but it puzzled me because until now I hadn't appreciated there was a functional link between the flaps and the seatbelt sign on some Airbus types. If the A330 has this same function then a fault in it would probably explain what I observed.
Last edited by DY444; Feb 28, 2026 at 9:55 am