As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR DISAGREE WARNING AFTER TAKEOFF WHEN GEAR SELECTED UP. PERFORMEDGVI OF LANDING GEAR SYSTEM WITH NO DEFECTS NOTED. INSTALLED LANDING GEAR PINS , REMOVED FLAGS AND SAFETIED IAW CRJ AMM 32-11-00, 32-00-00. DEFERRED LANDING GEAR RETRACTION SYSTEM PER MEL 32-30-01, CAT A.