As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - ON CLIMB-OUT AFTER GEAR RETRACTION FROM SEA MAIN GEAR DOOR UNSAFE (AMBER) LIGHTS BOTH ILLUMINATED FOR A FEW SECONDS THEN WENT OUT AS APPROX 210 KIAS. SOON AFTER OPP 5000 MSL NOSE GEAR UNSAFE (AMBER) LIGHT DID SAME. ALT GEAR EXTENSION USED BEFORE LANDING PDX. ADJUSTED LGDRCL, RGDRCL, NGDRCL PROX SENSOR SW IAW Q400AMM TASK 32-61-06-830-801 AND REPLACED NGDRCL PROX HARNESS IAW 32-61-11-000-801 AND 32-61-11-400-801. OP CK IAW 32-31-00-710-801, OP CK GOOD. RETURNED TO SERVICE.