As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION FOUND ON FUSELAGE SKIN AROUND AFT RADIO ALTIMETER AT FRAME 68. SKIN AREA UNDER AFT RADIO ALT ANTENNA REPAIRED IAW ETD2017-145-027855. AFT RADIO ALT ANTENNA BASE AND SUPPORT REPLACED. HFEC PERFORMED ON REPAINTED AREA WITH NO FAULT.