Dear Folks,
When a SID is designed , if no info concerning climb gradient, 3,3% is to be considered. If more climb gradient is required it will published in the plate. The regulators basically , are telling you "to avoid obstacles , you have to comply with it" .EO considerations are left to you.
Suposing that your SID has a climb gradient you can not comply with , your operator must have an EOSID available for the EO case.
Now , about the approach climb performance:
All app plates consider as standard 2,1% for ILS CAT1 and 2.5% for ILS CAT2 and 3.
If , to avoid obstacles , they need you figures above the standard ones , they will state that.
Your operator , has to provide you with one table with the necessary adjustements in case you can not comply with that climb gradient SE.
The same table we have in the FCOM 3.05.35 (airbus) , but including higher climb gradients (in the FCOM`s we only have to 2.1% and 2.5%).I flew in one company which had this table available for some airports with a more demanding approach climb performance.
Some fellows referred the low temperatures. When corrections to the DA have to be made due to low temps, actually we are adjusting your DA to keep the same height at Mapt. So in case of go-around youŽll be complying with very same "vertical profile".
My 2 cents.
A-3TWENTY