What was found
(CAN) FEB 16/07, AIR TURN BACK. THE CREW REPORTED THAT AFTER TAKEOFF A LOUD RUMBLING NOISE WAS HEARD. CREW BELIEVED THAT ICE MAY HAVE BEEN INGESTED INTO THE RT ENGINE DURING LANDING ON THE PREVIOUS LEG INBOUND TO DESTINATION. MAINTENANCE CONFIRMED SEVERAL FAN BLADES WERE DAMAGED AT OUTER TIPS. THE FAN BLADES WERE REMOVED AND REPLACED AND A COMPRESSOR INSPECTION WAS CARRIED OUT WITH NFF. ENGINE RUNS WERE CARRIED OUT AND ALL PARAMETERS FOUND WITHIN LIMITS AND AIRCRAFT WAS RETURNED TO SERVICE. (TC NR 20070219001)