As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 1354 - AFTER TAKEOFF, LANDING GEAR FAILED TO RETRACT. AIRCRAFT AIR INTERRUPTED AND RETURNED ORD AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND ANTI-RETRACTION SOLENOID INOPERATIVE. REPLACED ANTI-RETRACTION SOLENOID AND PERFORMED MAINTENANCE TEST WITH NO FURTHER FAULTS NOTED. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)