As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX- ON FLIGHT 2358 AIRCRAFT RETURNED TO FIELD WHEN ON TAKEOFF GEAR DIDN'T RETRACT. RECEIVED 3 GREEN, 3 RED, GEAR HANDLE LIGHT AND LANDING GEAR INOPERATIVE CAUTION LIGHT. DID ALTERNATE GEAR EXTENSION TO NORMAL LANDING. REMOVED AND REPLACED LANDING GEAR SELECTOR VALVE. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.