As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH INTO JAC, ENCOUNTERED SEVERE TURBULENCE AND WINDSHEAR. MAXIMUM POWER WAS REQUIRED AND T6 EXCEEDED 900 DEG. AIRCRAFT NEEDS SEVERE TURBULENCE INSPECTION. DID NOT LAND IN JAC BUT RETURNED TO SLC. COMPLIED WITH SEVERE TURBULENCE INSPECTION WITH NO DEFECTS NOTED. REPLACED BOTH ENGINE ASSEMBLIES AND INSPECTED BOTH PROPS IAW MM 61-10-00.