As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 7948 - IAD - CREW REPORTED A SPOILER FAIL MESSAGE ON THE EICAS. SPOILERS WERE INDICATED AS BEING OPEN. NO CONTROLLABILITY ISSUES REPORTED BY CREW. MAINTENANCE REMOVED GREASE RESIDUE FROM THE LT SPOILER PROX SWITCH. OPS CHECKED GOOD.