As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - DURING GEAR RETRACTION, GOT GEAR DISAGREE MASTER WARNING. BY THE TIME CHECKLIST WAS RETRIEVED, MESSAGE WENT AWAY AND GEAR RETRACTION WAS NORMAL. RIGGED RUDDER PEDAL RVDT. C/W OPERATIONAL TEST OF LANDING GEAR EXTENSION/RETRACTION SYSTEM. NO DEFECTS NOTED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.