As l said previously
spannersatcx is spot on with his comments.
In the case of the B767 with CF6-80C2 engines, you carry out a dry motor after replacing a fuel filter element.
You would be surprised on what type of engine run is required after changing some components.
The same engine type on the A300-600, requires an engine run of 80% N2 for 2-3 minutes, if you change a starter motor.
However on the B767 it is only recommended, the minimum is an idle run.
spannersatcx will always rightly say, follow the AMM.
