As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - AFTER SELECTING THE GEAR UP, THE LEFT MAIN GEAR RED UNSAFE LIGHT STAYED ILLUMINATED. DID ALTERNATE GEAR EXTENSION. GEAR CAME DOWN AND LOCKED AS NORMAL. LANDING UNEVENTFUL. DIVERT FROM HLN. FERRY TO PDX. PSEU SHOWED NO FAULTS LIGHTLY TAPING ON LEFT GEAR INDICATOR LIGHT WITH FINGER TURNED RED UNSAFE LIGHT ON AND OFF. REPLACED LANDING GEAR CONTROL PANEL PER Q400 32-31-01-000-801 AND 32-31-01-400-801 TESTS GOOD. RETURNED TO SERVICE.