As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND INSTALLED BEARING, SUSPECTED PN 5542308-7, DID NOT FULLY SEAT TO THE PISTON WHEN TIGHTENED ONTO THE PISTON. CLOSER EXAMINATION OF THE INSIDE OF THE BEARING REVEALED AN OFFSET OF THE MACHINED PORTION SURROUNDING THE METERING PIN HOLE. THAT OFFSET, NOT CONCENTRIC WITH THE BODY OF THE BEARING, CAUSED THE PISTON TO CONTACT THE MACHINED PORTION & STOP PRIOR TO FULL SEAT OF THE PISTON TO THE BEARING.