As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR RETURN ON CLIMB CABIN PRESS A 0.1 NEVER PRESSURIZED AT 9000FT CABIN ALT CAUTION MESSAGE. PERFORMED GVT OF A/C WITH NO DEFECTS NOTED INSP OUTFLOW VALVE WITH NO DEFECTS PERFORMED OPERATIONAL TEST OF THE CABIN PRESSURE CONTROLS IAW CRJ900 AMM 21-31-00 CKS GOOD PRESSURIZED A/C WITH NO DEFECTS REF CRJ 900 AMM 21-31-00 AND NO LEAKS DETECTED A/C FOUND OK FOR SVC.