As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT THE CREW RECEIVED SPOILER FAIL AND SPOILER OPEN MESSAGES. THE AIRCRAFT RETURNED TO IAH AND LANDED WITHOUT INCIDENT WHERE MAINTENANCE REPLACED A SPOILER PROXIMITY SENSOR. OPERATIONAL CHECKS WERE PERFORMED AND THE DISCREPANCY WAS CLEARED.