As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER CLIMB ON CLEANUP FLAPS SLOW TO RETRACT. STARTED GETTING A CONSTANT "CONFIG" "FLAPS" WARNING. AC PERFORMED AIR T TURN BACK AND LANDED .MTX GROUNDED AC AND TROUBLESHOT . REMOVED AND REPLACED LANDING CONFIG WARNING AND MODULE TAKE OFF WARNING CARD MODULE IAW B767-300 AMM 31-51-04. PERFORMED OPERATIONAL TEST OF BOTH CARDS. OPS CHECK NORMAL. MTX RETURNED AC TO SERVICE .