Originally Posted by
chfenton
I have heard of that rule before-only three masks will drop hence no more than 0ne lapchild on each side of the F row. The only thing I never understood is whether oxygen masks are configured late enough in the process of building the plane that they know that it will be a F config because obviously there are at least 4 masks per side in Y rows to accompany a lap child in 3 across seating.
The overhead PSU's (passenger service units) are easily reconfigured by maintenance when the seating is changed. It is not a big deal to do, but involved a significant amount of paperwork, as anything related to configuration control is on aircraft.