As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CRUISE FLIGHT THE CREW RECEIVED OTBD FLIGHT SPOILER & OTBD SPOILERON EICAS MESSAGES. IF WAS CONFIRMED THAT THE LT MULTI-FUNCTION SPOILER WAS NOT MOVING. A DECISION WAS MADE TO DIVERT & THE ACFT LANDED UNEVENTFULLY. TROUBLESHOOTING REVEALED THE LT OTBD MULTI-FUNCTION SPOILER PCU WAS FAILED. THE SPOILER PCU WAS REPLACED & THE ACFT RETURNED TO SERVICE.