Sciolistes,
unfotunately I do not have a ready reference to attach or quote.
it is my understanding that
cerification requirement for approach climb gradient one engine inop:-
is 2.1% for twins, 2.4% for 3eng, and2.7% for 4eng a/c.(from ATPL days)
Doc8168 refers to the 2.5% used to establish procedures and charts.
Do correct me if I am wrong.
cheers
