As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED: PILOT REPORTS SLAT INITIAL PRIMARY FAIL MESSAGE ON INITIAL FLAPS SELECTION AFTER START CHECKLIST. FOUR CYCLES OF FLAP HANDLE, SAME MESSAGE. SPLIT FLAP INDICATION. MAINTENANCE PERFORMED FIM TASK 27-81-00-810-810. FSEU TEST WAS SATISFACTORY. NO FINDINGS.