As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - ON FLIGHT 2525, AIRCRAFT RETURNED TO FIELD. NOSE DOOR OPEN MASTER WARNING. MAINTENANCE RESECURED LT NOSE LANDING GEAR TARGET. PERFORMED OPERATIONAL TEST OF THE LANDING GEAR, TEST GOOD. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.