As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT JB432 MCO-BOS INBOUND TO BOS CREW DECLARED AN EMERGENCY LANDING AFTER SELECTING FLAPS 2 RECEIVED "SLAT FAIL" AT POSITION 3, QRH PROCEDURES FOLLOWED. FLAPS OPERATED NORMALLY WHILE SLATS REMAINED AT POS 3 AIRCRAFT LANDED WITHOUT INCIDENT. BOS MX TROUBLESHOOTING FOUND THAT THE RIGHT WING LEADING EDGE SLAT HARNESS POSITION 3/4 FAILED. REMOVED AND REPLACED HARNESS PER AMM 27-83-00 CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.