Landing Performance on a sloping Runway
I fly fairly regularly into an airport with a shortish runway (2000m) and fairly steep upslope in the prevailing landing direction. I had a disagreement after landing with the Captain I was flying with regarding landing performance. I flew a stable approach aiming at the touchdown zone and on the glidesope/PAPI all the way. This led to the GPWS "50" callout after passing over the piano keys. He felt I was "high", despite me touching down abeam the PAPIs.
He said for landing performance in all cases one should cross the threshold at 50'. I am aware this is the standard screen height and landing performance is based on this. However, with a steep upslope and the 3° Glide/PAPIs leading you to the touchdown zone, my figures calculate for this particular runway on a 3° slope the threshold is 16' below a "flat" runway profile, so if making a 3° approach aiming at the TDZ, one crosses the threshold at 66'.
I have looked in my copy of Swatton, and it doesn't really broach the subject. I would welcome opinions and references as it is an area I could do to improve my knowledge on.