As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON RETRACTION, INBOARD FLAPS REMAINED AT 20°. AFTER LANDING FLAPS RETRACTED NORMALLY. MAINTENANCE REPLACED THE FLAP BYPASS VALVE, THE INBD FLAP ASYMMETRIC RELAY R187 AND THE INBD FLAP INDICATOR PER THE AMM, ACCOMPLISHED THE FLAP OPERATIONAL CHECK PER THE AMM, FOUND NORMAL AND RETURNED THE AIRCRAFT TO SERVICE.