As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED GEAR DISAGREE RED MASTER WARNING MESSAGE UPON RETRACTION OF LANDING GEAR. INDICATOR INDICATED THREE (3) GREEN DOWN AND LOCKED THE WHOLE TIME. CREW RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT, REMOVED AND REPLACED LANDING GEAR SELECT HANDLE AND PERFORMED CHECKS USING AIRCRAFT MAINTENANCE MANUALS. AIRCRAFT RELEASED FOR SERVICE.