As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING TASKCARD 78472010, FOUND NR 1 ENG FAN BLADE NR 13 WITH MISSING CU-NI-IN COATING ON CONCAVE SIDE OUT OF LIMITS. GROUNDED - YES. REMOVED AND REPLACED NR 13 AND NR 1 FAN BLADE PAIR REF. T/C 78472010 FAN BLADE LUBRICATION.