As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ONT- FLIGHT 2568, ON TAXI TO THE RUNWAY, RECEIVED A FLAP HALFSPEED MESSAGE AND A SLATS HALFSPEED MESSAGE. RETURNED TO THE GATE. MAINTENANCE CYCLED SHIPS POWER AND THE FLAP CONTROL HANDLE, AND LUBED THE FLAP CONTROL HANDLE. ALL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.