As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT CONTROL CHECK ON TAXI L/E SLAT DISAGREE INDICATOR ILLUMINATED WHEN FLAPS 5 WAS SELECTED. THE CREW RETURNED TO BLOCKS. MAINTENANCE GROUNDED THE AIRCRAFT. MAINTENANCE PERFORMED FSEU BITE PROCEDURE WITH NO FAULTS NOTED. PSEU BITE CHECKED AND RESET. FLAPS/SLATS OPERATED SEVERAL TIMES WITH NO FAULTS NOTED. AIRCRAFT WAS RETURNED TO SERVICE IAW FIM 27-51 FT 808.