As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DOUBLER AT STRINGER 27 BETWEEN FS 295.00 AND 310.00 IS CORRODED. REMOVED, LOCATED AND DRILLED NEW SERVICEABLE TCAS DOUBLER P/N: SH670-32364-7S IAW CRJ 900 51-40-11-001-001-A01, AND INSTALLED IAW CRJ 900 SRM 51-42-21-001-001-A01 AND 51-42-06-001-001-A01.