As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION FOUND ON TCAS OMNIDIRECTIONAL ANTENA CHANNEL BETWEEN FS295.0 - FS310 COMMON TO STR 27. (C-CHECK) RO 4/23/2020 REMOVED AND INSTALLED NEW TCAS ANTENNA CHANNEL DOUBLER BETWEEN FS 295.0 TO FS 310 REF DRAWING AND SRM. PRESSURE CHECK GOOD. SEE CONTINUATION CARD FOR DETAILS.