As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BLACK PROTECTIVE COATING APPARENTLY DID NOT BOND PROPERLY. AFTER SEPARATION OF THE PROTECTIVE COATING FROM THE PART'S SURFACE, MOISTURE/WATER WOULD BE ENTRAPPED BETWEEN THE SURFACE OF THE PART AND THE PROTECTIVE COATING, ULTIMATELY CAUSING CORROSION.