As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2100. ON DESCENT TO DESTINATION 29000FT SPDA FAIL DISPLAYED ON EICAS. ELECTED TO RETURN TO ORIGINAL AIRPORT AND ACCOMPLISHED A UNEVENTFUL LANDING. REMOVED FROM SERVICE. INTERROGATED CMC, FOUND FAULT CODE 24610017SP1. C/W FIM TASK 24-61-00-810-810-A STEP 5 A-C. FAULT REMOVED TRANSITORY CONDITION OF SPDA 1. A/C OK FOR SERVICE. RETURNED TO SERVICE. NO PARTS REPLACED.