As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PISTON SEIZED IN HIGH PITCH POSITION TO PISTON ROD TUBE (HAD TO BE REMOVED AND PRESSED OUT OF PISTON PROP) WOULD NOT CYCLE ON AIRCRAFT. PISTON TUBE AND PISTON SENT TO MFG TECH REP. SUSPECT THAT PROP GOV WORN PARTS ALLOWED METAL INTO PROP AND SEIZED PISTON TUBE. MARKED AND GROOVED PARTS.