As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5986 ATL TO DCA ON APPROACH FLAPS WERE SELECTED TO "1" AND CREW RECEIVED A "SLAT FAIL" AND "SHAKER ANTICIPATED" EICAS MESSAGES. CREW FOLLOWING THE QRH; SLATS REMAINED AT 0 BUT FLAPS COULD BE EXTENDED TO 2. EMERGENCY WAS DECLARED AND LANDING UNEVENTFUL. MAINTENANCE CLEARED INHIBITS AND RESET SYSTEM; OPS CHECK GOOD. THIS DISCREPANCY HAS NOT REPEATED.