As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED, "GEAR NOT RETRACTING." MAINTENANCE REMOVED AND REPLACED THE LANDING GEAR ELECTRONIC UNIT AND LANDING GEAR CONTROL LEVER IAW EMB145 AMM 32-32-01 AND 32-32-02. OPERATIONAL CHECKED SYSTEM GOOD. AIRCRAFT RELEASED FOR SERVICE.