What was found
ORD - FLT 4245 - LANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF. REMOVED AND REPLACED LANDING GEAR VALVE UP SOLENOID. AIRCRAFT RETURNED TO SERVICE. (X)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ORD - FLT 4245 - LANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF. REMOVED AND REPLACED LANDING GEAR VALVE UP SOLENOID. AIRCRAFT RETURNED TO SERVICE. (X)