As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT, LE SLAT DISAGREE LIGHT ILLUMINATED AFTER SELECTING FLAPS 25. CREW EXECUTED A MISSED APPROACH. FOLLOWED QRH PROCEDURES AND LANDED WITH FLAPS 20. MAINTENANCE PERFORMED FSEU READ-OUT FORM IAW AMM ALL SENSORS WITHIN LIMITS. FLAP SLAT SYS OPS NORMAL WITH NO FAULTS OK FOR SERVICE.