As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WEAR ON EXTERNAL FUSELAGE SKIN FS913.00 TP FS 927.00 BTW STGR 26LH TO STGR 26RH DISTRIBUTION DUCT FS913.00 TP FS 927.00 WAS REMOVED AND INSTALLED PER CRJ-900 AMM 21-23-38, LEAK TEST WAS PERFORMED PER CRJ-900 AMM 21-23-00. WEAR ON EXTERNAL FUSELAGE SKIN FS913.00 TP FS 927.00 BTW STGR 26LH TO STGR 26RH WAS REPAIRED PER EA NO: CRJ953-20720. REV: IR.