As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON INTERNAL DOUBLER IN STA. FS= 295 TO FS= 310 BETWEEN STRG 26LH TO 26RH AT MAIN AVIONICS COMPARTMENT. A NEW INTERNAL DOUBLER IN STA. FS= 295 TO FS= 310 BETWEEN STRG 26LH TO 26RH AT MAIN AVIONICS COMPARTMENT WAS INSTALLED PER CRJ 900 SRM 51-42-06-001-001-A01.