As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER FLAPS 20 TAKEOFF, FLAPS FAIL CAUTION MSG AND FLAPS FAILED AT FLAPS 17 AND SLATS 20. REMOVE AND REPLACED THE SLATS/FLAPS ELECTRONIC CONTROL UNIT IAW AMM 27-51-05-000/400-801. TESTED THE (SFECU2) BY CLEARING OF INHIBIT IAW AMM 45-45-00-970-821. PERFORM THE SFECU2 SELF TEST IAW AMM 27-51-05-740-801. CHECK MDC FOR OTHER FAULTS. ALL FAULTS ARE CLEARED AT THIS TIME.