As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - ON APPROACH TO PDX RECEIVED 3 RED INTRANSIT LIGHT INDICATIONS, BUT LANDING GEAR DID NOT EXTEND. ALTERNATE GEAR EXTENSION PERFORMED AND GEAR EXTENDED. AIRCRAFT LANDED IN PDX WITHOUT FURTHER PROBLEM. WIRING FOR GEAR DOWN SELECTOR INHIBIT SWITCH, REPAIRED. GEAR OPS CHECKED GOOD ON GEAR SWING. AIRCRAFT RETURNED TO SERVICE.