As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A ROUTINE OIL CHANGE, METAL WAS FOUND IN THE OIL. METAL WAS DETERMINED TO BE LIFTER MATERIAL. LIFTERS WERE REMOVED FOR INSP AND ALL 12 LIFTERS WERE FUND TO BE SPALLING ON THE FACES AND CHIPPING ON THE SIDES. CAMSHAFT LOBES WERE ALSO SHOWING SIGNS OF WEAR. ENGINE WAS REMOVED AND RETURNED TO O/H VENDOR TO BE REPAIRED.