As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING T/C 78472000, FOUND THE NR 1 ENGINE FAN CASE FLANGE CRACKED FWD ATTACH POINT OF FIRE OVERHEAT DETECTOR BRACKET AT 11;30 O`CLOCK. ACFT GROUNDED. THE NR 1 ENGINE FAN CASE FLANGE WORKED ON TC SBCFM56-7B-72-0580-1. INSTALLED. OPS CHECKED GOOD.