As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ROTATION THE FLIGHT CREW RECEIVED AN SPS 2 FAIL MESSAGE ON EICAS FOLLOWED BY AN SPS ADVANCE MESSAGE. THE FLIGHT RETURNED TO DEPARTURE AND LANDED WITHOUT INCIDENT. MX REPLACED THE STALL WARNING COMPUTER AND THE STALL SYS OPERATED NORMALLY.