As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSIÓN ON STRINGER AND SPLICE 25RH IN STA. FS=319.70 TO FS=333.00 AT MAIN AVIONICS COMPARTMENT. SUMMARY; STRINGER AND SPLICE 25RH IN STA. FS=319.70 TO FS=333.00 AT MAIN AVIONICS COMPARTMENT WERE REPLACED PER CRJ-900 SRM 51-42-06-001-001-A01. SRM 51-42-21-001-001-A01.