As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING FLIGHT, CREW RECEIVED GROUND SPOILER DEPLOY CAUTION MESSAGE. CONFIRMED IT WAS NOT ACTUALLY DEPLOYED. EICAS SHOWED FULLY EXTENDED. RETURNED TO FIELD. CORRECTIVE ACTION: R&R RH INBOARD GROUND SPOILER PROX SENSOR (TC# 20191004017)