Originally Posted by
OPEN DES
The FPA correction chart in your QRH is a company specific DU.
Airbus abandoned the FPA correction chart because they don’t want crew to blindly select an FPA and then stop monitoring ‘alt vs distance’. They wanted to avoid the false sense of safety after having extracted a single number from the chart. In the same sense we should not blindly rely on a nominal FPA -3.0 to always do the trick in ISA conditions.
What about hot temperature corrections? And so on......
-You select what you need and adjust, by active monitoring and periodic crosschecking.
-The FPA is baro-inertial and only correct in ISA conditions. (Baro-long term)
Could not agree more. Even during normam ISA standard NPA we do monitor DME/altitude during final and make needed corrections as needed. I cannot understand how you can just get a figure for an FPA from a book and blindly applying it.