As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND BLADE PAIR NR 4 S/N DB186689-C WITH SHIM WEAR CONVEX AREA L AND NR 16 S/N DB187438-2 WITH CU-NI ON CC SURFACE TE BEYOND LIMITS. ESN 896150. GROUNDED - YES. REMOVED NR 4 DB186689-C AND S/N DB187438-2 AND INSTALLED NEW FAN BLADES S/N DC891306-4 AND S/N DD866197-0 IAW FAN BLADE MAP AND REF TC 78472002.