I'm happy with all that, up to
ps in abnormal you don't have the overweight correction like in normal conditions. That is already taken care by the margins given in the abnormal computations.
Not true unfortunately, or at least not any more. The QRH clearly gives the OVW correction to be applied in all these failure cases, and it's also spelled out in the FCTM, you have to add both the WGT correction and THEN the OVW correction.
And therein lies the problem, this new OVW correction has added an extra several hundred meters that wasn't required before, to all these difficult ones like slats/flaps jammed and dual hydraulic failures, basically made it impossible for an immediate return at heavy weights. I don't know if we've been flying around unsafe in these things for the last 30 years or if they've suddenly decided to change things for the sake of change
