Hmmm. I would have said the same. Once inflight the dispatch requirements are out the window (unless the operator specifies differently).
However, this quote:
Before commencing an approach to
land at the destination aerodrome the commander must satisfy himself/herself that a landing can be made in full compliance
with OPS 1.510 and subparagraphs (a) and (b) above.
confused me. Is it only applicable if the conditions in 1.515 d) apply?
Is this a new addition? Don't remember anything like that in JAR Ops at the time.
That is what is confusing me as well and the reason I started this thread.
However, I found this statement on an IFALPA document (written with the assistance of Boeing Flight Operations Department) called "Certified versus Advisory landing data on Boeing aircraft":
"Advisory data is provided to meet operational needs on varying
runway conditions with the expectation that crews will assess landing performance based on actual weather and runway conditions
at the time of arrival as opposed to those prevailing at the time of dispatch, when Certified data is used."
Notwithstanding what I've written above, the Missed Approach Climb gradient 1EO must be satisfied, at least 2.5% (or higher if the destination/Alternate requires).
If you are not able to comply with it and no runway change is available, you have to either reduce your weight (to the one you selected in the dispatch phase) or ask for another procedure with a different Missed Approach not requiring the limiting gradient.
In simple terms:
RUNWAY DISPATCH numbers may be disregarded in actual conditions due to the fact that those are factored and actual conditions still permit a safe landing with an adeguate margin (even if less than the dispatch one) at higher weights.
GO AROUND DISPATCH numbers, as they are not factored, are the same as the actual ones (you can basically use the same table if your airline provides the informations based on Max Weight to satisfy the requirement).
So, if the Landing limitation was the Missed Approach, and conditions are almost like the dispatch ones, you won't be able to comply with it with the higher weight obtained by shortcuts or optimum flight levels...