As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA TO MFR FLIGHT NR 2457: AFTER TAKEOFF, ALL THREE GEARS FAILED TO RETRACT. THREE RED AND THREE GREEN LIGHTS REMAINED ILLUMINATED. RAN CHECKLIST. NO HELP. HANDLE DID ILLUMINATED AMBER. FLIGHT WAS DIVERTED TO PDX. MAINTENANCE REMOVED NLG WOW 2 CENTERING WIRING HARNESS IAW 32-31-11-000-801AND REPLACED IAW INSTALLATION AMM TASK 32-21-11-400-801. OPS CHECK GOOD. AIRCRAFT WAS RETURNED TO SERVICE.