As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 4922 - DURING CLIMB THE LANDING GEAR WOULD NOT RETRACT. THE AIRCRAFT RETURNED TO IAH AND LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE LANDING GEAR ELECTRONIC UNIT, PERFORMED LANDING EXTENSION AND RETRACTION CHECKS THEN CLEARED THE DISCREPANCY.