As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"INITIAL INSPECTION : CORROSION ON STGR 26LH BTW FS333 TO FS364 AT MAIN AVIONICS COMPARTMENT ( E/E ) (TCI 100-09) "SUMMARY: STRINGER 26LH BTW FS333.00 TO FS364.00 AT MAIN AVIONICS COMPARTMENT WAS REPLACED FOR A NEW ONE PER CRJ-900 SRM 51-42-06-001-001-A01 AND SRM 51-42-21-001-001-A01 (CORROSION LEVEL 2).