As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"LATE FINDING: CORROSION ON STRINGER AND SPLICE 21RH IN STA. FS= 333 TO FS= 349 AT MAIN AVIONICS COMPARTMENT. (E/E) (W1) TCI: 53-20-305 ""CORROSION LEVEL 2. STRINGER AND SPLICE 21RH IN STA. FS= 333 TO FS= 349 AT MAIN AVIONICS COMPARTMENT WERE REPLACED PER CRJ900 SRM 51-42-06-001-001-A01 PAR.6.C AND CRJ900 SRM 51-42-20-001-001-A01 PAR.6.C "SH670-31197-1