Originally Posted by jlemon

Bonus Wonder: Boeing 727 aircraft with five across seating.....

Back when United was introducing new Boeing 727-100 aircraft into its fleet, they also introduced a new service featuring the 727: One-Class Red Carpet

http://www.departedflights.com/UApitchyourtent64.html

I'm pretty sure the seat configuration was 2-3 throughout 727 with regard to this One-Class Red Carpet service as another United ad at the time concerning their Red, White & Blue service compared the White a.k.a. Standard service featuring 2-3 seating on the DC8 with the One-Class service.

http://www.departedflights.com/UAredwhiteblue64b.html

BTW, United's One-Class Red Carpet service did not last too long as its B727-100 aircraft were then reconfigured to more traditional 2-2 seating in F and 3-3 seating in Y.

The other airline was Air Atlanta which made this statement in 1984 concerning their 727 coach cabin:

"The coach section of our Boeing 727 has been reconfigured from the usual 3 and 3 coach seating to 2 and 3......"