I note the 52J config has the stairway coming up under seat 18B - Perhaps Qantas only found they could get another 2 seats upstairs by doing this after an aircraft or 3 had been configured for 50J. Or perhaps some aircraft have different floor strengths in that area (Perhaps the 'Ugly Sisters').
This is pure speculation of course ...
Last edited by serfty; Nov 27, 2007 at 3:36 pm