Originally Posted by
Prospero
It relates to the size of the inflatable raft housing. Single lane slide-rafts are fitted at doors 3L/3R so the housing doesn’t project so far into the cabin as dual lane rafts.
The linked diagram shows the raft arrangement on UA’s 787-8:
https://paxex.aero/united-airlines-7...aris-seat-map/
I am so glad you brought this us up since I have just noticed the 787-8 diagrams incorrectly show housings for dual lane rafts at 3L/3R
Thanks for the info! And my next q was going to be about the 788s in fact, but you beat me to it.