As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SPOILER FAIL EICAS MESSAGE APPEARED AND CYCLED EVERY 30-60 SECONDS AFTER TAXING IN AND PARKED AT THE RAMP. MAINTENANCE TROUBLESHOT AND FOUND TO BE INTERMITTENT SPOILER CONTROL UNIT. REMOVED AND REPLACED THE SPOILER CONTROL UNIT, OPS CHECKED GOOD.