As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TPE - FLT CS921 - DURING CLIMB-OUT, NR 3 KRUEGER FLAP FAILED TO RETRACT. FLIGHT CREW RAN CHECK LIST AND AIR RETURNED TO TPE. MAINTENANCE REMOVED AND REPLACED NR 3 LEADING EDGE FLAP ACTUATOR PER MM 27-87-22 AND SYSTEM OPERATION CHECK GOOD. AIRCRAFT RELEASED FOR FLIGHT. (X)