What was found
SEA - AFTER GEAR SELECTED DOWN THE NOSE AMBER ADVISORY LIGHT REMAINED ILLUMINATED AN ADDITIONAL 20 SECONDS AFTER LEFT AND RIGHT MAIN AMBER ADVISORY LIGHTS EXTINGUISHED. FERRIED TO PDX FOR REPAIRS. CHECKED PSEU FOR CURRENT AND HISTORY FAULTS. NO CURRENT FAULTS. HISTORY FAULTS PSEU CHANNEL D INOP, RESEARCHED PSEU HISTORY AND FOUND HISTORY OF GEAR DOOR PROBLEMS. TEARDOWN REPORT NO PROBLEMS. REPLACED PSEU, CK GOOD. VERIFIED INDUCTANCE CHECK OF PROX SENSORS FOR NLG SYS, NO DEFECTS. RETURNED TO SERVICE.