As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING TC 78472000 ON THE NR 2 ENGINE, FOUND FAN DUCT PANEL NR 12, AFT OTBD FASTENER PULLED THRU THE PANEL. ACFT GROUNDED. REMOVED AND REPLACED KEY-LOCKED INSERT FOR THE NR 12 FAN DUCT PANEL IAW SPM 70-42-13. INSTALLED THE FAN DUCT PANEL IAW AMM 72-23-07-400-801-F00.