As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER FLAP RETRACTION AFTER TAKEOFF INBOARD FLAP DISAGREEMENT. ATTEMPTED CONTROL WITH FLAP HANDLE PER QRH TO NO EFFECT.TROUBLESHOT FLAP SYSTEM IAW MM 27-50-01 AND IAW FIM 27-50-01. COULD NOT GET A FAILURE. ALSO REPLACED FLAP CONTROL UNIT. OPS CHECK GOOD.