As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"AWR; [ TASK R53520 STEP 7 ]; INITIAL INSPECTION: CORROSION ON SILLS IN STA. FS= 349 TO FS= 409 BETWEEN 41RBL TO 46RBL AT PAX CABIN FWD WET AREA. (W1) (CPAX) "CORROSION LEVEL 2. SILLS IN STA. FS= 349 TO FS= 409 BETWEEN 41RBL TO 46RBL AT PAX CABIN FWD WET AREA WAS REPLACED PER CRJ 900 SRM 51-42-06-001-001-A01 PAR 6C AND CRJ 900 SRM 51-42-20-001-001-A01 PAR 6C. "