As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAJOR AIRFRAME INSPECTION, FOUND CORROSION ON PYLON SKIN AND STRAPS P/N 78286-76070-20086-101, -102. PARTS WERE CONSIDERED UNSERVICEABLE AND REPLACED. EXHAUST GASES COULD HAVE POSSIBLY ACCELERATED THE CORROSION PROCESS. REGULAR CLEANING OF TAIL AND APPLICATION OF CPC.