As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO PLATFORM AS DUE TO AUTO SLAT FAIL LIGHT ON, BOTH STALL WARNING COMPUTERS WERE FOUND WITH FAILURES, PROXIMITY SWITCH AND "C" AND "D" SENSORS WERE TESTED AND FAIL CONTINUE. EXCESSIVE GREASE WAS DETECTED IN OUTBOARD SLATS ACTUATORS. ACTUATORS WERE CLEANED AND STALL WARNING COMPUTER WAS REPLACED IAW MM. TEST OK.