Originally Posted by
andrasz
A boroscope inspection will reveal if there is any damage to the engine core. If yes, indeed a full teardown. Regardless of the core, the fan disk will need extensive testing to check for any signs of overstress, if the test is positive it will need to be discarded, such damage is non-repairable. Any visible damage on the fan blades and especially the cowling is the least of the worries here.
Given the unusual circumstances of this accident, IMO, the two engines will be completely torn down and inspected, replacing any suspected or damaged parts. A simple boroscope inspection isn't good enough. There is much potential liability to be avoided by doing a complete teardown, internal inspection and subsequent engine testing before a return to service...