As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURN BACK, SLATS DISAGREE LIGHT ON AFTER FLAP/SLAT RETRACTION AFTER TAKEOFF SLATS VISUALLY VERIFIED EXTENDED IN FLIGH TWITH FLAP/SLAT HANDLE IN O/RET POSITION. REMOVED AND REPLACED FLAP/SLAT HANDLE POS SWITCHES PERFORMED TEST OF FLAP/SLAT HANDLE POS SWITCHES F/C OK PER MM CH 27-80-07. (M)