As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - CREW REPORTED FLAP DISAGREEMENT FAULT ON TAKEOFF. THEY ELECTED AN AIR TURN BACK AND MADE AN UNEVENTFUL LANDING. MAINTENANCE COULD NOT FIND PROBLEM ON GROUND. LATER THE SAME DAY IN SUX THE PROBLEM REOCCURRED WITH AN AIR TURN BACK AND UNEVENTFUL LANDING. MAINTENANCE REMOVED AND REPLACED LEFT OUTBOARD FLAP ACTUATOR. OPS CHECK GOOD. (M)