As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN FLIGHT SPOILERS WERE DEPLOYED ON DESCENT, OTBD SPOILERONS, & OTBD FLIGHT SPOILERS POSTED ON EICAS. FLIGHT CONTROL SYNOPTIC PAGE SHOWED RT SPOILERON AS A YELLOW BOX & IT DID NOT DEPLOY. INTERROGATED MDC, FOUND RT OTBD MFS PCU FAILED & PCU JAM MSG. PERFORM SPOST 1 RESET. PERFORMED OPERATIONS CHECK IAW ETN-CR-27-093. OPERATIONS CHECKED GOOD.