As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR SELECTED TO UP POSITION WITH INDICATIONS SHOWING IN TRANSIT WITH NO GEAR MOVEMENT, CYCLED GEAR WITH NO CHANGE. PLACED GEAR LEVER IN DOWN POSITION FOLLOWED WITH THREE GREEN LIGHTS, RETURNED TO LAX. REMOVED AND REPLACED LANDING GEAR ELECTRONIC CONTROL UNIT IAW EMB AMM 32-32-01. PERFORMED EXTENSION AND RETRACTION CHECKS WITH NO DEFECTS IAW EMB AMM 32-30-00. RETURNED AIRCRAFT TO SERVICE.