As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEG- PTU SWITCH LIGHT REMAINED "ON" WITH THE SWITCH IN THE OFF (OUT) POSITION DURING THE AFTER TAKEOFF CHECKLIST. RETURNED TO THE FIELD AND ACCOMPLISHED A UNEVENTFUL LANDING. REMOVED & REPLACED PTU SWITCH IAW AMM 29-00-01 PGS 412-417. OPS CK GOOD. RETURNED TO SERVICE.