As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, THE CREW REPORTED A GEAR DISAGREE, THE NLG WOULD NOT RETRACT, BOTH MAINS RETRACTED WITHOUT ISSUE. WE DEFERRED THE LANDING GEAR RETRACTION SYSTEM AND THE AIRCRAFT FLEW ON TO CLT. ADJUSTED PROX SENSOR PS13 IAW CRJ 200 AMM OPS CHECK GOOD.