As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MKE - FLT 4321 - LANDING GEAR FAILED TO RETRACT AFTER TAKEOFF FROM MKE. WITH LANDING GEAR HANDLE IN THE UP POSITION AND HYD PRESSURE NORMAL. THE LIGHT INDICATION SYSTEM SHOWED SIX GREEN LIGHTS AND ALSO THREE RED UNLOCK LIGHTS ON FORWARD PANEL. CONTINUED FLIGHT TO ORD AND LANDED SAFELY. RAI'D LANDING CONTROL LEVER AND PERFORMED OPS CHECK PER ATR-72 JIC TASKS. OPS CHECK NORMAL. AIRCRAFT WAS RETURNED TO SERVICE. (M)