As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDED SFO UNDER AMBER ALERT DUE TO SLAT DISAGREE LIGHT. *S/D* LEADING EDGE SLAT BINDING IN THE NUMBER ONE POSITION. ROTARY ACTUATOR CAUSED THE OVERLOAD INDICATOR ON THE ACTUATOR TO POP AND SHUT DOWN THE SLAT AND FLAP SYSTEM. REPLACED THE NUMBER ONE POSITION SLAT ROTARY ACTUATOR AND RETURNED TO SERVICE WITHOUT FURTHER OCCURRENCE.