As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT FACE OF PRESSURE BULKHEAD FS 1098, 20, AT LT LOWER O/B AIR DUCT FLANGE AT 5:00 POSITION HAS A BOLT WORKING LOOSE AND CUTTING INTO THE FLANGE AND MAYBE HE BULKHEAD. REPAIRED IAW EA CRJ953-12316 REMOVED AND REPLACED LOWER O/B L/H BLEED AIR DUCT IAW CRJ900 AMM 30-11-02