As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, AMBER LE FLAP LIGHT REMAINED ON AND NR 8 SLAT AMBER LIGHT ON S/O PNL. ON RETURN TO LAX LE FLAPS LIGHT STAYED ON, BUT ALL SLATS/FLAPS POS TEST SHOWS RETRACTED. RAN TEST USING TEST BOX 10M2425 PER M/M AND NR 8 SLAT ACTUATOR FAILED TEST. REPLACED NR 8 SLAT ACTUATOR AND OPS CK NORMAL PER M/M.