As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 4340 - AIRFRAME DE-ICE FAULTY IN-FLIGHT. AIRCRAFT RETURNED TO ORD. LANDING UNEVENTFUL IN ORD. REMOVED AND INSPECTED AIRFRAME DE-ICE CONTROLLER 'B'. GROUND RUN CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE. PART TOTAL CYCLES, 10799.0. (X)