As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON STRG 23RH BTW FS349 TO FS364 AT MAIN AVIONICS COMPARTMENT CORROSION ON STRG 23RH BTW FS349 TO FS364 AT MAIN AVIONICS COMPARTMENT WAS EVALAUTED OUT OF LIMITS , THEREFORE WAS REPLACED PER CRJ 900 SRM 53-00-00-101-001-A01, SRM 51-42-06-001-001-A01 AND SRM 51-42-21-001-001-A01.