As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
3 OF THE 4 BOLTS THAT ATTACH THE METAL PLATE THAT THE ACTUATOR IS MOUNTED ON TO THE WASTEGATE BODY WERE MISSING. FOURTH BOLT WAS BACKED OUT ABOUT HALF WAY. ALL THREE BOLTS FOUND LOOSE IN ENGINE COMPARTMENT. WASTEGATE ASSEMBLY ONLY 287 FROM OVERHAUL BY MAIN TURBO.THESE BOLTS ARE NOT EASILY OBSERVABLE AND REQUIRE A MIRROR TO SEE. RECOMMEND INSPECTION AT EACH OIL CHANGE AND TIGHTEN AS NEEDED.