As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5615 - RECEIVED GEAR DISAGREE MESSAGE, MAINS STUCK IN UP POSITION. ABORTED APPROACH, DECLARED EMERGENCY, MANUALLY DEPLOYED GEAR. LANDED WITHOUT INCIDENT. REPLACED GEAR SELECTOR LEVER. ALSO FOUND MLG SELECTOR VALVE CAP LOOSE AND SECURED. NO FURTHER DEFECTS.