As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND METAL IN OZONE CONVERTER. METAL CONTAMINATION A RESULT FROM A FAILED/MELTED ENGINE PNEUMATIC PRECOOLER, 767-400 FLEET HISTORY. REMOVED RT ENG RT CORE COWL. REMOVED PRECOOLER. INSTALLED PRECOOLER PER MM. INSTALLED CORE COWL, LEAK CHECK GOOD. ALSO REPLACED RIGHT ENGINE PRESSURE REGULATING VALVE.