Q
There has been a change by Boeing on this area of ops since the original 744 non-normal procedures. When I first started on 44s the non-normal, for a WAI valve stuck open, required that the air on that side of the aircraft had to be isolated within 30 seconds of touchdown - (obviously to prevent leading edge distortion). Now, however, there is no specified time limit, just 'after landing'. Slightly less caution perhaps, or more realism?