Well if there is 50 inches worth of seating, are these 767's 300's? If so are they the same door wise as the GSM fleet.
Most 767-300's have a 6 door config 2 front 2 middle and 2 aft, GSM's dont they have 4, 2 front 2 aft, and 4 mini exits on the wing.
Is the reason they cant have 50" because they are 200's or that there is a problem with this middle door option?