As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT CONTROL SLAT FAULT WHILE EXTENDING FLAPS 1 ON APPROACH TO PDX. DECLARED AN EMERGENCY AND LANDED SAFELY. REPLACED RIGHT WING TRACK 11 SLAT TYPE B ACTUATOR PER AMM 27-84-49. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.