With respect to the A320 QRH - In Flight Performance landing distance ( both without and with failures) is anyone really aware whether these figures include an additional safety margin or are they actual figures?
I did hear a strong opinion in the past that these are actual figures but after some search I could not locate anywhere officially such assertion.
From the QRH, the figures does not include the safety margin (15%). The 15% margin becomes too restrictive during emergency. So depends on situation and airline policy.
Attached are the slides given during Airbus rep presentation.