As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING T/C 78472010. NR 1 ENGINE, BLADE NR 1 FAILED BLADE ROOT ULTRASONIC INSPECTION, PER SBCFM56-7B-72-1033-1. REQUIRES BLADE AND BLADE PAIR CHANGE. GROUNDED-YES. REMOVED AND REPLACED THE FAN BLADES NR 1 AND NR 13 ON NR 1 ENGINE, REF T/C 78472010.