Hi, the aircraft has been de-iced and the wings and the engine inlet has been cleaned or clean.
So no ice in the vicinity where it could probably hit the engines.
Found a while ago a power point presentation about different fan blade damages and their prossible cause.
With the tips bended forward they where refering as a possible too low power setting during approach in icing conditions where ice could form on the back side of the fan blades. This might cause, when changing the power later during approach or when setting reverse power to twist and or bend the blades forward.
Dont know if I am allowed to post this power point slides here on the forum.
This is exactly the wording at least what they said. Same pictures as mine :
Only two fan blades damaged
The blade tip curls are smooth with no obvious impact deformation
The energy of the impact did not result in blade tearing
FAST samples revealed no foreign debris
This is consistent with ice damage
The ice ingestion occurred during a low power setting, probably during the approach phase
The scratch on one of the fan blades below the tip curl was due to the two blades being shipped together for analysis and not protected from contact with one another