As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON FURTHER INSPECTION OF PISTON HOUSING AFTER BLEEDER SHEARED OFF, CORROSION AND CRACKS WERE FOUND AT LOCATOR PIN HOLES. SUBMITTER SUGGESTS CORROSION COULD BE STOPPED BY MORE FREQUENT CLEANING AND PAINTING. CRACKS MAY HAVE STARTED FROM OVERTORQUE OF NUTS ON PINS.