JAR-OPS Landing Wet runway
Hello,
I have a question regarding wet runway dispatch requirements. I was reading Airbus getting to grip with aircraft performance to brush up my knowledge a little bit.
On dry runways you may not use more than 60% of the LDA.
But do I need to use the 60% margin on wet runway calculations? Or
is it enough to use dry distance * 1,15??
The case for my airplane is that we have special performance tables for wet runways, how do I use this to comply with jar-ops requirements? The reason I ask is because if I use the 115% * dry runway, I end up with for example 1250M. But if i use the table for wet runways, it says 1850M.
In this case I dont find it safe to use the Jar-ops 115% factor, so I want to use what the book say 1850M, but which factors do I have to use on this value? Do I need to apply the 60% rule? Or the 115% rule? Or no factor at all?
I feel that if I use the 60% rule, the result is unreasonable long runway requirements.
Of course you should use your good judgement and always be on the safe side, but I would like to know what the correct jar-ops way is.
Thanks!