Hi guys,
I´m new on the Bus, so I know very little and I have many doubts.
This one is related to the overweight landing checklist..... Here we go!
The table at the bottom of the page must be checked to find out if landing must be performed using the recommended flap setting (FULL) or rather FLAP 3.
I understand the background. At the dispatch, approach climb limits must be met. This means 2.1%, gear down, landing flaps etc etc etc. Additionally, if the DH is below 200ft, or, a GA gradient of 2.5% (or higher) is required, we must check that we comply with this 2.5% (or higher if required).
What I don´t understand is what the named table is assuming... 2.1% or 2.5% ?????? !!
The following is directly copied and pasted from the A330 FCTM:
"The approach climb gradient limiting weight tables in QRH Refer to
FCOM/DEL-xxx Duref Cible FCOM are provided for conservative QNH and consequently may slightly differ from Refer to
FCOM/PER-GOA-ACG-NOR CONF 3 - Gradient 2.5%.
However this statement confuses me, because if I make direct comparisons between these 2 different tables, it seems that the QRH table is in fact less conservative, worse, I don´t know what gradient the table is assuming.... e.g:
Assume 20ºc at PA 2000´:
QRH limiting weight: 232.000kg
FCOM PER limiting weight: 225.000kg (CONF 3, CAT II, 2.5%)
In deed this is actually the situation that most worries me, because if I where to perform an approach with DH above 200´, I know that by certification I always comply with the 2.1% (CS-AWO).
What If I must perform a CAT III approach? Personally I would refer to the most restrictive table (FCOM PER)....
Can somebody spell some light over this matter? What does the QRH table actually assume... 2.1%, 2.5%..........?
Well, this here is me beating around the bush...! Such an essay for such a tiny little doubt!
Help will be greatly rewarded! (Not really, it will however be deeply appreciated
)
Thank you all,
Alberto