How do you guys compensate for runway gradient when making your landing distance calculations? There is inconsistency in the use of gradient in both manufacturer and vendor provided data. The AFM doesn't seem to have a correction chart for landing (it does for takeoff) while the QRH has a note to add 650 feet per 1% downhill gradient. Where does that note come from? Entering a downhill slope into the FMS does result in a greater landing distance. Neither APG or ASAP seem to provide runway analysis that corrects for slope, and UltraNav doesn't factor it into landing distance computations.
Obviously we want to use the more conservative data and will correct for the slope, so my question is how do you manage this inconsistency when doing your preflight planning?
Thanks in advance
T-Bone
Obviously we want to use the more conservative data and will correct for the slope, so my question is how do you manage this inconsistency when doing your preflight planning?
Thanks in advance
T-Bone