As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WITH GEAR RETRACTION NOSE WHEEL REMAINED DOWN AND LOCKED FOR 23 SEC AFTER MAINS WERE UP AND LOCKED. NOSEWHEEL AMBER, RED AND UNSAFE LIGHTS REMAINED ILLUMINATED. GEAR CAME UP BY ITSELF AND LIGHTS WENT DARK. ALTERNATE GEAR EXT ACCOMPLISHED. REPLACED NLG LOCK ACTUATOR.