As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE MAKING METAL, MFG DETERMINED IT TO BE CAMSHAFT/ LIFTER MATERIAL ENGINE RETURNED TO FACTORY FOR REPAIR. THIS IS THE SECOND OCCURRANCE OF CAMSHAFT/ LIFTER SPALLING AND 5TH OCCURANCE OF ENGINES MAKING METAL IN A FLEET OF 5. POSSIBLE MANUFACTURING AND MATERIAL PROBLEMS FROM THE MFG.