As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CHECK 4 MAINTENANCEON ENGINE, FAN ROTOR WAS REJECTED FOR SEVERAL CRACKS ON THE INNER FLOW PATH, POSSIBLY STEMMING FROM THE AFT FACE. ONE OF THE CRACKS HAS PROPAGATED INTO THE T/E OF THE BLADE. THE CRACKS APPEAR TO BE EVERY 3 TO 4 BLADES.