Originally Posted by
eigenvector
You're assuming the space allocated to the economy class cabin is the same, which it seems is not the case. Everything posted here so far indicates the density of seating in the Y cabin is identical between the refurb 77W and the 77P.
The space allocated to the Y cabin in the refurb 77W and 77P is most definitely not the same. A quick glance at the cabin layouts is enough to see this.
http://www.aircanada.com/en/about/fleet/77W.html
The 77P pre-refurb is layout 2, with 5 rows of Y seats ahead of the wing. The 77P post-refurb is layout 4, same deal. The 77W post-refurb is layout 3, with no Y seats ahead of the wings.