Unless otherwise specified, porosity or inclusions visible without magnification on anymachined surfaces or surfaces intended to contain fluids may be rejected. Any gross porositywith a dimension 1/4 of section thickness or porosity found at a gate or riser connection isunacceptable. All other defect indications shall be reported in the PPAP documentationsubmitted to Caterpillar, Inc. All other defects of any kind that interfere with part functionality willbe rejected and should be defined during the APQP phase.