As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TOP OVERHAUL, NOTICED LOWER EDGE OF PISTON SKIRT ON SUPERIOR SL10545 PISTONS HAD BEEN CONTACTING OPPOSING CONNECTING ROD CAPS AT BOTTOM OF STROKE. THE NEW PISTON REPLACMENTS SL10545 HAVE DIFFERENT DIMENSIONS MEASURED FROM LOWER EDGE OF PISTON PIN HOLE TO LOWER EDGE OF SKIRT BY APPROXIMATELY .015 INCH ALLOWING CLEARANCE WITH OPENING CONNECTION ROD CAPS.