As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SUSPECTED UNCOMMANDED DEPLOYMENT OF RT FLIGHT SPOILER. AT FL 290, WITH A/P ON AIRPLANE INCLINED TO RIGHT. A/P DISCONNECTED, CAUTION MESSAGE 'R FLT SPLR', FOLLOWED BY STATUS MESSAGES 'FLT SPLRS FAULT' AND 'O/B GND SPLR FAULT'. MAINTENANCE FOUND RT FLIGHT SPOILER O/B PCU SOLENOID VALVE RESISTANCE +90 OHMS AND SECU NR 1 DEAD.