As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(WIFI) AFT ATG ANTENNA INNER CHANNEL HAS CORROSION. (C-CHECK RO 10/22/2021) REMOVED AND REPLACED WITH NEW AFT ATG ANTENNA INNER CHANNEL REF CRJ900 SRM 51-42-21-001-001-A01 AND DWG P13112-20110 REV H. PRESSURE CHECKS GOOD, NO LEAKS NOTED COMPLIED WITH 51-900-1002-SKY.