As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX FLIGHT: AFTER TAKEOFF, LANDING GEAR FAILED TO RETRACT. AIRCRAFT WAS FERRIED TO PDX. MAINTENANCE INTERGATED PSEU AND FOUND NW CENT OPEN IN THE PRESENT FAULTS. REMOVED NLG WOW 2/CENTERING HARNESS IAW MM TASK 32-21-11-000-801. REPLACED AND INSTALLED HARNESS IAW 32-21-11-400-801. PERFORMED A FUNCTIONAL TEST OF THE NOSE WHEEL STEERING SYSTEM AND AN OPERATIONAL TEST OF THE LANDING GEAR EXTENSION AND RETRACTIONAL TEST CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.