As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON ANNUAL INSPECTION OF THE LEFT ENGINE THREE PUSHRODS WERE NOTED TO BE CRACKED ALONG WHAT LOOKS LIKE THEIR ENTIRE LENGTHS. THE THREE DEFECTIVE PUSHRODS WERE REPLACED WITH NEW ONES, AND THE REMAINDER OF THE PUSHRODS WERE OVERHAULED FOR BOTH ENGINES. CAUSE OF THIS DEFECT IS UNKNOWN.