Still a bit of a grey area, is an engine classes as a component in the true meaning of the word?
If the CNA is damaged is the repair scheme in your Airbus SRM - if not you really need to be careful as to what you use to certify against any repair.
At our outfit we can use the engine manuals to certify against only on the authority of our powerplant department. If however the damage was in the pylon area it'd most likely be in the Airbus SRM and we are allowed to certify against that.
Tends to vary company to company and your quality dept is the best place to call on to find the definitive answer.