As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN AVIONICS BAY TCAS ANTENNA DOUBLER BETWEEN FS295.00 AND FS310.00 CORRODED (C-CHECK RO 9/8/2021) REMOVED AND REPLACED CORRODED TCAS ANTENNA DOUBLER WITH NEW UNIT. REF CRJ900 SRM 51-42-06-001-001-A01 AND CRJ900 SRM 51-42-21-001-001-A01 AND DWG SH670-30023 REV G. COMPLIED WITH TASK CARD 51-900-1002-SKY. SEE CONTINUE CARD FOR DETAILS OF WORK PERFORMED. NO LEAKS NOTED.