As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT MAIN GEAR DOOR REMAINED OPEN AFTER LANDING GEAR RETRACTION. AFTER CYCLING GEAR, THE DOOR CLOSED NORMALLY. FERRIED AIRCRAFT FROM SEA TO PDX FOR REPAIRS. IN PDX, REPLACED THE NR 1 MAIN GEAR DOOR PROXIMITY SENSOR AND THE SEQUENCE VALVE. OPERATIONAL CHECKS GOOD.