As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ARM ASSEMBLY HAD CRACK INDICATION ON OUTBOARD MOUNTING LUG EXTENDING FROM .256 INCH/.252 INCH DIAMETER THROUGH-HOLE TO .34 INCH RADIUS. CIRCUMSTANCES UNDER WHICH CRACKING OCCURRED ARE UNKNOWN. POSSIBLE CAUSE IS FROM FRETTING MOVEMENT BETWEEN SLEEVE MOUNTING EARS, AND ARM ASSEMBLY MOUNTING LUGS. ALL THROUGH-HOLES OF BOTH SLEEVE AND ARM ASSEMBLY MEET BLUEPRINT REQUIREMENTS OF .256 INCH/.252 INCH DIAMETER. (X)