As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIT-PHL - FLT 1161 - ON TAKEOFF, THE LANDING GEAR DID NOT RETRACT UNTIL RECYCLED. ON LANDING, RECEIVED AMBER LANDING GEAR SYSTEM DIS MESSAGE. THE MESSAGE THEN CLEARED AND ALL SYSTEMS RETURNED TO NORMAL. THE FLIGHT LANDED WITHOUT INCIDENT. MAINTENANCE PERFORMED THE CENTRAL FAULT DISPLAY SYSTEM (CFDS) AND BITE CHECKS OF LANDING GEAR CONTROL AND INTERFACE UNIT'S (LGCIU) ONE AND TWO. BOTH SYSTEMS CHECKED OK. (M)