As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN/OAK - FLT 2026 - AFTER FLAP RETRACTION, THE NR 2 LEADING EDGE DEVICE DID NOT INDICATE RETRACTED. AMBER LIGHT REMAINED ON. THE CREW RETURNED TO DEN AND LANDED WITHOUT ANY FURTHER DIFFICULTIES. REMOVED AND REPLACED LEADING EDGE FLAP POSITION SWITCH AND OPERATIONALLY CHECKED NORMAL. THE AIRCRAFT WAS RETURNED TO SERVICE. (X)