As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, ATTEMPTED FLAPS UP. DISAGREEMENT FLAP LIGHT ILLUMINATED (OUTBOARD WAS AGREEING BUT NOT THE NACELLE AND INBOARD). REFERED TO QRH HOWEVER UNSUCCESSFUL. RETURNED TO LAX. CLEANED CANNON PLUGS ON OUTBOARD FLAPS AND RECHECKED FLAP CONTROL UNIT. OPERATED FLAPS NUMEROUS TIMES. OPS CHECKS GOOD.