As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED LG CAUTION LIGHT SHORTLY AFTER TAKEOFF, DECLARED AN EMERGENCY AND RETURNED TO FIELD AT DEN. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT IS STILL CURRENTLY OUT OF SERVICE. MAINTENANCE REMOVED AND REPLACED THE ELECTRONIC PROXIMITY SWITCH UNIT PER BOMBD AMM, OPS CHECK GOOD.