As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING POST FLIGHT INSP, FOUND BROKEN TAB RETAINER IN LOWER COWLING. FURTHER INVESTIGATION REVEALED THE TAB WAS FROM THE OIL COOLER SUPPLY LINE HOLD DOWN RETAINER. THE RETAINER IS USED ON OIL LINE, PN 3060997-1. THE SECOND RETAINER WAS ALSO REPLACED AS IT SHOWED SIGNS OF OVER STRESS.