Originally Posted by
bitburgr
I can remember using them on a UA flight around 1990.
Yeah; I definitely used them at some point in the 1988-1991 period, probably as late as Summer 1991, which would have been on UA. I can't remember whether or not I saw them when I was just starting to fly on my own around 93-94, although if they had them then, they disappeared swiftly after that - I do not remember seeing them in the 95+ period when I was flying very regularly.
Originally Posted by
greenery-travel
I used to fly DL a lot in the early 2000s and saw the tubes as recently as then. Perhaps on a 727 or L10-11.
In use, or just remaining outlets for them?