As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING INSPECTION, FOUR TURNBUCKLES FROM A FLIGHT CONTROL TRIM SYSTEM WERE FOUND CRACKED. ONE MS21251B-5L, TWO MS21251B-2L, & ONE MS21251-B2L. CRACKS ARE LONGITUDINAL IN AREA OF LOCKING GROOVE. REMINDER THERE MAY STILL BE TURNBUCKLES IN SERVICE FROM TIME OF INITIAL COMMUNICATIONS ON THIS SUBJECT. REFERENCE DHC-6 TWIN OTTER SERVICE BULLETIN 6 471.